Find the volume of a cone, in terms of pi, with a radius of 3 inches and a height of 6inches. If the radius of the cone is doubled while the height remains constant, what is the volume of the cone? What happens to the volume of a cone if it's radius is doubled?

Question

anonymous · Answer

V = 1/3 pi*r^2*h
r = 3, h = 6
V = 1/3 pi*(3^2)*6
V = 1/3 pi*(9)*(6)
V = 1/3 pi*54
V = 18 pi
If we double the radius, the volume is four times greater than before. 
So if our radius goes from 3in to 6in, the volume goes to 72 pi.

anonymous · Answer

Thank you. I had switched them around and had it wrong.