SOLUTION: A cylindrical can has a volume of 128pi cm^3 and is 8cm tall. What is its radius?

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Question 213152: A cylindrical can has a volume of 128pi cm^3 and is 8cm tall. What is its radius?
Answer by rapaljer(4671) About Me  (Show Source):
You can put this solution on YOUR website!
V=pi%2Ar%5E2%2Ah
128%2Api=pi%2Ar%5E2%2A8

Divide both sides by 8%2Api
16=r%5E2
r=4 or r=-4

Reject the negative value.

Radius = 4 cm.

R^2