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#2726 2011-07-06 01:52:01
- Jai Ganesh
- Administrator
- Registered: 2005-06-28
- Posts: 50,628
Re: 10 second questions
Hi bobbym and anonimnystefy,
The solution 3004 is correct. Excellent!
#3005. The height of a wall is six times its width and the length of the wall is seven times its height. If the volume of the wall be 16128 cubic meters, what is its width?
It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.
Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.
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#2727 2011-07-06 01:55:10
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: 10 second questions
Hi ganesh;
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
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#2728 2011-07-06 02:06:38
- anonimnystefy
- Real Member
- From: Harlan's World
- Registered: 2011-05-23
- Posts: 16,049
Re: 10 second questions
hi ganesh
Here lies the reader who will never open this book. He is forever dead.
Taking a new step, uttering a new word, is what people fear most. ― Fyodor Dostoyevsky, Crime and Punishment
The knowledge of some things as a function of age is a delta function.
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#2729 2011-07-07 00:38:00
- Jai Ganesh
- Administrator
- Registered: 2005-06-28
- Posts: 50,628
Re: 10 second questions
Hi bobbym and anonimnystefy,
The solution 3005 is 4 meters. Good work, anonimnystefy! (The unit in the solution 3005 is m, not cm)
For the problems 3006 and 3007, use
if required.#3006. Find the number of lead balls, each 1 cm in diameter that can be made from a sphere of diameter 12 cm.
#3007. How many spherical bullets can be made out of a lead cylinder 28 cm high and with base radius 6 cm, each bullet being 1.5 cm in diameter?
It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.
Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.
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#2730 2011-07-07 01:28:39
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: 10 second questions
Hi ganesh;
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
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#2731 2011-07-07 16:20:10
- Jai Ganesh
- Administrator
- Registered: 2005-06-28
- Posts: 50,628
Re: 10 second questions
Hi bobbym,
The solution 3006 is perfect. Good work!
#3008. A copper sphere of diameter 18 cm is drawn into a wire of diameter 4 mm. Find the length of the wire.
#3009. Two metallic right circular cones having their heights 4.1 cm and 4.3 cm and the radii of their bases 2.1 cm each, have been melted together and recast into a sphere. Find the diameter of the sphere.
It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.
Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.
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#2732 2011-07-07 16:47:47
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: 10 second questions
Hi;
I am using pi = 3.14159265...
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
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#2733 2011-07-08 00:17:36
- Jai Ganesh
- Administrator
- Registered: 2005-06-28
- Posts: 50,628
Re: 10 second questions
Hi bobbym,
The solutions 3008 and 3009 (radius = 2.1 cm) are correct. Good work!
#3010. If the first term of an Arithmetic Progression of consecutive integers is p[sup]2[/sup] + 1, then what is the sum of (2p + 1) terms of this series?
It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.
Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.
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#2734 2011-07-08 00:44:44
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: 10 second questions
Hi ganesh;
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
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#2735 2011-07-08 01:12:47
- Jai Ganesh
- Administrator
- Registered: 2005-06-28
- Posts: 50,628
Re: 10 second questions
Hi bobbym,
#3011. There are five letters and five addressed envelopes, then what is the number of ways in which no letter is placed in correct envelope?
It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.
Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.
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#2736 2011-07-08 01:25:28
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: 10 second questions
Hi ganesh;
#3010 Thanks, I need to study that.
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
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#2737 2011-07-08 16:39:21
- Jai Ganesh
- Administrator
- Registered: 2005-06-28
- Posts: 50,628
Re: 10 second questions
Hi bobbym,
#3012.
#3013.
It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.
Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.
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#2738 2011-07-08 19:51:49
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: 10 second questions
Hi ganesh;
Anyway, continuing with the questions.
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
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#2739 2011-07-09 16:58:24
- Jai Ganesh
- Administrator
- Registered: 2005-06-28
- Posts: 50,628
Re: 10 second questions
Hi bobbym,
The solutions 3012 and 3013 are correct. Well done!
#3014. A rectangular plot measuring 90 meters by 50 meters is to be enclosed by wire fencing. If the poles of the fence are kept 5 meters apart, how many poles would be needed?
#3015. The length of a rectangular plot is 60% more than its breadth. If the difference between the length and the breadth of that rectangle is 24 cm, what is the area of that rectangle?
It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.
Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.
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#2740 2011-07-09 17:59:05
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: 10 second questions
Hi ganesh;
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
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#2741 2011-07-10 01:29:19
- Jai Ganesh
- Administrator
- Registered: 2005-06-28
- Posts: 50,628
Re: 10 second questions
Hi bobbym,
The solutions 3014 and 3015 are correct. Excellent work!
#3016.
It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.
Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.
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#2742 2011-07-10 02:30:16
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: 10 second questions
Hi ganesh;
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
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#2743 2011-07-10 17:14:11
- Jai Ganesh
- Administrator
- Registered: 2005-06-28
- Posts: 50,628
Re: 10 second questions
Hi bobbym,
The solution 3016 is perfect. Brilliant!
#3017. How many iron rods, each of length 7 m and diameter 2 cm can be made out of 0.88 cubic meters of iron?
#3018. The radii of two cylinders are in the ratio 3:5 and their heights are in the ratio 2:3. Find the ratio of their curved surface areas.
It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.
Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.
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#2744 2011-07-11 05:35:12
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: 10 second questions
Hi ganesh;
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
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#2745 2011-07-11 17:51:27
- Jai Ganesh
- Administrator
- Registered: 2005-06-28
- Posts: 50,628
Re: 10 second questions
Hi bobbym,
The answer 3017 I get is 400.
The answer 3018 is correct. Well done!
#3019. Find the length of canvas 1.25 m wide required to build a conical tent of base radius 7 meters and height 24 meters.
#3020. The heights of two right circular cones are in the ratio 1:2 and the perimeters of their bases are in the ratio 3:4. Find the ratio of their volumes.
It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.
Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.
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#2746 2011-07-11 18:10:47
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: 10 second questions
Hi ganesh;
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
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#2747 2011-07-11 23:28:42
- Jai Ganesh
- Administrator
- Registered: 2005-06-28
- Posts: 50,628
Re: 10 second questions
Hi bobbym,
The solutions 3019 and 3020 are correct. Excellent!
#3021. Find the value of x if
It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.
Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.
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#2748 2011-07-11 23:45:21
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: 10 second questions
Hi ganesh;
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
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#2749 2011-07-12 16:11:03
- Jai Ganesh
- Administrator
- Registered: 2005-06-28
- Posts: 50,628
Re: 10 second questions
Hi bobbym,
The solution 3021 is correct. Neat job!
#3022. What is the capacity of a tank in liters of dimensions (8 m x 6 m x 2.5 m)?
#3023. Find the surface area of a brick 10 cm x 4 cm x 3 cm.
It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.
Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.
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#2750 2011-07-12 16:39:15
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: 10 second questions
Hi;
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
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