Volume & Surface Area

**andi01** · June 2nd 2009, 02:37 PM

How would I solve this problem?

You were asked to design a sphere with a volume of 128cm3. What should the diameter of the sphere be?

Thanks.

**craig** · June 2nd 2009, 02:43 PM

Originally Posted by andi01

How would I solve this problem?

You were asked to design a sphere with a volume of 128cm3. What should the diameter of the sphere be?
Thanks.

Hi andi.

The volume of a sphere is found by the formula $V = \frac{4}{3}\pi r^3$ where $r$ is the radius of the sphere. Remember, radius is twice the diameter.

Therefore we get:

$128 = \frac{4}{3}\pi r^3$

$r^3 = \frac{96}{\pi}$

I'm sure you can work this out now

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