Asked by polly

how do i find the lentgh of the radius given the volume and height useing 3.14 example v=314ft3 h==25 ft


Please show me how to do it

Answers

Answered by drwls
Are you talking about a cylinder?
If so,
V = pi*r^2*h
314 = 3.14 r^2 * 25
100/25 = r^2
r = sqrt 4 = 2 feet
Answered by MsPJ
Just set up you equation and plug in what numbers you know.

Volume = pi x r^2 x height

314 = 3.14 x r^2 x 25
multiply on the same side of the =
314 = 78.5 x r^2
now, divide both sides by 78.5 to get the variable by itself
Finally, take this small, easy to work with number and find its square root!
Hope this helps!

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