Question

A cone has a diameter of 8 centimeters and a height that is 4 times the diameter. Using 3.14 for pi, which of the following can be used to calculate the volume of the cone?
one over three(3.14)(32cm)2(4cm)
one over three(3.14)(32cm)2(8cm)
one over three(3.14)(4cm)2(32cm)
one over three(3.14)(8cm)2(32cm)

Answer 1

The volume of a cone is given by the formula

... V = (1/3)π·r²·h

You have a radius of 4 cm and a height of 4·8 cm = 32 cm, so this becomes

... V = (1/3)π·(4 cm)²·(32 cm)

This seems to match your 3rd selection, ...

... one over three(3.14)(4cm)2(32cm)