A cylinder and a rectangular prism have the same volume and same height. The base of the prism is a square with side length 9 cm.
What is the approximate radius of the cylinder?
A. 4.5 cm
B. 5.1 cm
C. 12.9 cm
D. 25.8 cm

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 9 cm.
What is the approximate radius of the cylinder?
A. 4.5 cm   
B. 5.1 cm   
C. 12.9 cm   
D. 25.8 cm

redstealth29 · Answer

do you know the circumference of the cylinder?

anonymous · Answer

No

kellileslie17 · Answer

From your question, the prism has a square base of 9cm in length, which makes its base area is 9cm*9cm= 81cm² 
πr² = 81cm² 
Divide both sides by π
r² = 81cm²/π 
r = √81cm²/√π 
r = 9cm/√π 
r = 5.1cm ...(B).

anonymous · Answer

Thank You :)