Question

A cylinder and a rectangular prism have the same volume and same height. The base of the prism is a square with side length 8 cm.

What is the approximate radius of the cylinder?

A.
2.5 cm

B.
4.0 cm

C.
4.5 cm

D.
20.4 cm

Answer 1

C. 4.5cm

Explanation:

area of circle:
`\pi r^(2)`

volume of cylinder:
`\pi r^(2)` x height

volume of square prism: (side length)^2 x height

make the 2 equations equal each other (make sure to plug in values)