Question 849780

solve for r: 

v = 1/3*pi*r^2h

v = (pir^2h)/3

3v =  (pir^2h)

3v/pih = r^2

Take the square of both sides.

SQRT{3v/pih} = SQRT{r^2}

SQRT{3v/pih} = r

Note: SQRT = square root