SOLUTION: Hello, I need some help please! I have a composite word problem. It states: volume of a cylinder. The volume V of a right circular cylinder of height h and radius r is V= the pie

Algebra ->  Algebra  -> Test  -> Lessons -> SOLUTION: Hello, I need some help please! I have a composite word problem. It states: volume of a cylinder. The volume V of a right circular cylinder of height h and radius r is V= the pie      Log On

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Question 600648: Hello, I need some help please! I have a composite word problem. It states: volume of a cylinder. The volume V of a right circular cylinder of height h and radius r is V= the pie symbol, r^2h. If the height is twice the radius, express the volume V as a function of r.
Answer by jim_thompson5910(28476) About Me  (Show Source):
You can put this solution on YOUR website!
V=pi%2Ar%5E2%2Ah


V=pi%2Ar%5E2%2A%282r%29 Replace 'h' with '2r' (since the height is twice the radius)


V=2pi%2Ar%5E2%2Ar


V=2pi%2Ar%5E3


So the volume is now V=2pi%2Ar%5E3