Question

Find the diameter of a cone that has a volume of 83.74 cubic inches and a height of 5 inches. Use 3.14 for pi.



a.  3 inches
b. 4 inches 
c. 8 inches 
d. 16 inches

Answer 1

Volume of cube = 1/3 * pi * r^2 * h
83.74 = 1/3 x 3.14 x r^2 x 5 = 5.233r^2
r^2 = 83.74/5.233 = 16
r = sqrt(16) = 4

Therefore, d = 2(4) = 8 inches.

Answer 2

Just took the test it's 8inches so it's (C)