Discussion about math, puzzles, games and fun. Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ π -¹ ² ³ °

You are not logged in.

- Topics: Active | Unanswered

**ganesh****Moderator**- Registered: 2005-06-28
- Posts: 22,575

Hi bobbym,

The solution M # 21 is correct. Good work!

M # 22. Find the circumference and area of the circle of radius 8.4 centimeters.

It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi.

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

Offline

**bobbym****bumpkin**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 108,456

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.**

Offline

**ganesh****Moderator**- Registered: 2005-06-28
- Posts: 22,575

Hi bobbym,

The solution M # 22 is correct. neat work!

M # 23. Find the area of a circle whose circumference is 22 centimeters.

It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi.

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

Offline

**bobbym****bumpkin**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 108,456

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.**

Offline

**ganesh****Moderator**- Registered: 2005-06-28
- Posts: 22,575

Hi bobbym,

The solution M # 23 is correct. Neat work!

M # 24. Find the area of a quadrant of a circle whose circumference is 22 centimeters.

It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi.

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

Offline

**bobbym****bumpkin**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 108,456

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.**

Offline

**ganesh****Moderator**- Registered: 2005-06-28
- Posts: 22,575

Hi bobbym,

The solution M # 24 is correct. Good work!

M # 25. If the perimeter of a semi-circular protractor is 108 centimeters, find the diameter of the protractor.

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

Offline

**bobbym****bumpkin**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 108,456

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.**

Offline

**ganesh****Moderator**- Registered: 2005-06-28
- Posts: 22,575

Hi bobbym,

The solution M # 25 is perfect. Good work!

M # 26. The circumference of a circle exceeds the diameter by 16.8 centimeters. Find the radius of the circle.

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

Offline

**bobbym****bumpkin**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 108,456

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.**

Offline

**ganesh****Moderator**- Registered: 2005-06-28
- Posts: 22,575

Hi bobbym,

The solution M # 26 is perfect. Good work!

M # 27. Two circles touch externally. The sum of their areas is

square centimeters and the distance between their centers is 14 centimeters. Find the radii of the circles.Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

Offline

**bobbym****bumpkin**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 108,456

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.**

Offline

**ganesh****Moderator**- Registered: 2005-06-28
- Posts: 22,575

Hi bobbym,

The solution M # 27 is correct. Marvelous!

M # 28. Two cirles touch internally. The sum of their areas is

square centimeters and the distance between their centers is 6 centimeters. Find the radii of the circles.Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

Offline

**bobbym****bumpkin**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 108,456

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.**

Offline

**ganesh****Moderator**- Registered: 2005-06-28
- Posts: 22,575

Hi bobbym,

The solution M # 28 is correct. Excellent!

M # 29. A wire is looped in the form of a circle of radius 28 centimeters. It is re-bent into a square form. Determine the length of the side of the square.

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

Offline

**bobbym****bumpkin**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 108,456

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.**

Offline

**ganesh****Moderator**- Registered: 2005-06-28
- Posts: 22,575

Hi bobbym,

The solution M # 29 is correct. Neat work!

M # 30. A race track is in the form of a ring whose inner circumference is 352 meters and the outer circumference is 396 meters. Find the width of the track.

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

Offline

**bobbym****bumpkin**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 108,456

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.**

Offline

**ganesh****Moderator**- Registered: 2005-06-28
- Posts: 22,575

Hi bobbym,

M # 31. A wheel has diameter 84 centimeters. Find how many complete revolutions must it take to cover 792 meters.

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

Offline

**bobbym****bumpkin**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 108,456

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.**

Offline

**ganesh****Moderator**- Registered: 2005-06-28
- Posts: 22,575

Hi bobbym,

The solution M # 31 is correct.

M # 32. The diameter of a driving wheel of a bus is 140 centimeters. How many revolutions per minute must the wheel make in order to keep a speed of 66 kilometers per hour?

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

Offline

**bobbym****bumpkin**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 108,456

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.**

Offline

**ganesh****Moderator**- Registered: 2005-06-28
- Posts: 22,575

Hi bobbym,

The solution M # 32 is correct. Good work!

M # 33. A car has wheels which are 80 centimeters in diameter. How many omplete revolutions does each wheel make in 10 minutes when the car is taveling at a speed of 66 kilometers per hour?

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

Offline

**bobbym****bumpkin**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 108,456

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.**

Offline

**ganesh****Moderator**- Registered: 2005-06-28
- Posts: 22,575

Hi bobbym,

The solution M # 33 is perfect. Brilliant!

M # 34. A sector is cut from a circle of radius 21 centimeters. The angle of sector is 150°. Find the length of its arc and area.

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

Offline