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

@hartnn @ganeshie8

Answer 2

pi*radius^2=64
radius^2=64/pi
radius=sqrt(64/pi).

Answer 3

Solve that.

Answer 4

@eatacat I don't get it.

Answer 5

Which part don't you get?

Answer 6

Wait . . . square root of 20.3821656051 is 4.51466118387, so it must be C. I just didn't understand the formulas for a second. Thanks!

Answer 7

It's C.

Answer 8

I should've typed it out like this.

r = √(64/pi)