10 second questions

anonimnystefy · 2012-01-04 01:47:10

hi ganesh

Jai Ganesh · 2012-01-04 14:08:42

Hi bobbym and anonimnystefy,

I get the same as bobbym, that is, 36.5. Good work, bobbym!

#3505. The perimeter of a triangle is 30 centimeters and its area is 30 square centimeters. If the largest side measures 13 centimeters, what is the length of the smallest side of the triangle?

#3506. If the ratio of cost price and the selling price is 5 : 6, what is the gain percent?

bobbym · 2012-01-04 14:22:49

Hi ganesh;

anonimnystefy · 2012-01-04 23:10:49

hi guys.i don't get how you get that ans for 3504.can you explain?

bobbym · 2012-01-04 23:12:54

Average is 36, there are 50 pieces of data. 50 * 36 = 1800. One of them is 25 more than 23. So the new total is 1825. Average is 1825 / 50

anonimnystefy · 2012-01-04 23:15:13

hi bobbym

i got the question as: the observation "labeled" 48 was wrongly taken as 23.i get it now.thanks

bobbym · 2012-01-04 23:16:11

Hi anonimnystefy;

Your welcome, happens to me too.

Jai Ganesh · 2012-01-04 23:19:08

Hi bobbym,

The solutions #3505 and #3506 are correct. Neat work!

#3507. The perimeter of a rhombus is 40 centimeters. If the length of one of its diagonals be 12 centimeters, what is the length of the other diagonal?

#3508. Three circles of radius 3.5 centimeters each are placed in such a way that each touches the other two. Find the area of the portion enclosed by the circles.
(Use

)

bobbym · 2012-01-04 23:45:45

Hi ganesh;

Jai Ganesh · 2012-01-05 18:43:16

Hi bobbym,

The solutions #3507 and #3508 are correct. Outstanding!

#3509. Four equal sized maximum circular plates are cut off from a square paper sheet of area 784 square centimeters. What is the circumference of each plate?

(Use

)

#3510. A lends $2500 to B and a certain sum to C at the same time at 7% annual simple interest. If after 4 years, A altogether receives $1120 as interest from B and C, what is the sum lent to C?

bobbym · 2012-01-05 19:11:48

Hi ganesh;

Jai Ganesh · 2012-01-06 01:24:25

Hi bobbym,

The solutions #3509 and #3510 are correct. Brilliant performance!

#3511. A sum of money becomes

of itself in year at a certain rate of simple interest. What is the rate of interest per annum?

bobbym · 2012-01-06 01:31:48

Hi ganesh;

Jai Ganesh · 2012-01-06 23:11:58

Hi bobbym,

#3512. Which is the least number which when doubled would be divisible by 12, 18, 21, and 30?

#3512. If 6 persons working 8 hours a day earn $8400 per week, then how much is earned by 9 persons working 6 hours a day per week?

bobbym · 2012-01-06 23:23:55

Hi ganesh;

Jai Ganesh · 2012-01-08 22:32:53

Hi bobbym,

The solutions #3512 and #3513 are correct. Marvelous!

#3514. A man spends 1/3 of his income on food, 2/5 of his income on house rent, and 1/5 of his income on clothes. If he still has $400 left with him, wat is his income?

#3515. Each member of a picnic party contributed twice as many dollars as the total number of members and the total collection was $3032. Find the number of members present in the party.

anonimnystefy · 2012-01-09 00:31:48

hi ganesh

Last edited by anonimnystefy (2012-01-09 02:01:09)

bobbym · 2012-01-09 01:27:01

Hi ganesh;

Jai Ganesh · 2012-01-09 22:13:22

Hi anonimnystefy and bobbym,

The solution #3514 is perfect. Brilliant!

I made a mistake in the problem #3515. The total collection was $3042, hence the number of members is 39. Mistake regretted! Well done, anonimnystefy and bobbym!

#3516. The average of 15 numbers is 7. If the average of first 8 numbers be 6.5 and the average of last 8 numbers be 9.5, then what is the middle number?

#3517. A tap can fill a tank in 6 hours. After half the tank is filled, three more similar taps are opened. What is the total time taken to fill the tank completely?

bobbym · 2012-01-09 22:23:51

Hi ganesh;

anonimnystefy · 2012-01-09 22:45:09

hi ganesh

Jai Ganesh · 2012-01-10 01:32:51

Hi bobbym and anonimnystefy,

The solutions #3516 and #3517 are correct. Smart work!

#3518. A can do a certain work in the same time in which B and C together can do it. If A and B together could do it in 10 days and C alone in 50 days, then B alone could do the work in how many days?

bobbym · 2012-01-10 01:38:36

Hi ganesh;

Jai Ganesh · 2012-01-10 22:25:56

Hi bobbym,

The solution #3518 is correct. Perfect!

#3519. Oranges are bought at the rate of 10 for $25 and sold at the rate of 9 for $25. What is the profit percent?

#3520. A hollow cylindrical tube 20 centimeters long, is made of iron and its external and internal diameters are 8 cm and 6 cm respectively. What is the volume of iron used in making the tube? (Use

)

bobbym · 2012-01-11 00:17:20

Hi ganesh;

Math Is Fun Forum

#3551 2012-01-04 01:47:10

Re: 10 second questions

#3552 2012-01-04 14:08:42

Re: 10 second questions

#3553 2012-01-04 14:22:49

Re: 10 second questions

#3554 2012-01-04 23:10:49

Re: 10 second questions

#3555 2012-01-04 23:12:54

Re: 10 second questions

#3556 2012-01-04 23:15:13

Re: 10 second questions

#3557 2012-01-04 23:16:11

Re: 10 second questions

#3558 2012-01-04 23:19:08

Re: 10 second questions

#3559 2012-01-04 23:45:45

Re: 10 second questions

#3560 2012-01-05 18:43:16

Re: 10 second questions

#3561 2012-01-05 19:11:48

Re: 10 second questions

#3562 2012-01-06 01:24:25

Re: 10 second questions

#3563 2012-01-06 01:31:48

Re: 10 second questions

#3564 2012-01-06 23:11:58

Re: 10 second questions

#3565 2012-01-06 23:23:55

Re: 10 second questions

#3566 2012-01-08 22:32:53

Re: 10 second questions

#3567 2012-01-09 00:31:48

Re: 10 second questions

#3568 2012-01-09 01:27:01

Re: 10 second questions

#3569 2012-01-09 22:13:22

Re: 10 second questions

#3570 2012-01-09 22:23:51

Re: 10 second questions

#3571 2012-01-09 22:45:09

Re: 10 second questions

#3572 2012-01-10 01:32:51

Re: 10 second questions

#3573 2012-01-10 01:38:36

Re: 10 second questions

#3574 2012-01-10 22:25:56

Re: 10 second questions

#3575 2012-01-11 00:17:20

Re: 10 second questions

Board footer