(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Jack and Jill each roll a sheet of 9X12 paper to form a cylinder.

Jack tapes the two 9-inch edges together.

Jill tapes the two 12-inch edges together.

Which is greater?

The volume of Jack's Cylinder

or

The volume of Jill's cylinder.

2. Relevant equations

Cylinder Volume: V=pi*r^2*h

3. The attempt at a solution

The problem that I was facing with this question was finding the radii.

However, I looked at the solutions and it says that

Jack's cylinder has a circumference of 12

and Jill's cylinder has a circumference of 9

Jack's height is 9

Jill's height is 12

I don't understand how they derived the circumferences ?!

once I know the circumference I can find the radius.

Thanks.

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# A GRE Question- Cylinder and Volume

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