What is the diameter of a cone with a height of 8m and volume of 150pi m^3?

V = PI x r^2 x h/3

150 = 3.14 x r^2 x 8/3

150 = 3.14 x r^2 x 2.67

150 = 8.373 x r^2

r^2 = 150/8.373

r^2 = 17.914

r = sqrt (17.914)

r = 4.23

diameter = r x 2 = 4.23 * 2 = 8.46 meters (Round answer as needed)