A cone has a height of 10cm and a volume of 9cm cubed. what is the radius of the cone?

Answer 1

If the radius is r
Vol = (1/3) π r^2 h
9 = (1/3)*π*r^2*10
27 = 10π r^2
r^2 = 27/(10π) = ....
take √ to get r

Answer 2

My answer was 2.5570=2.56