Question

Can someone pls help me I don’t know how to do this?!

Answer 1

D. 94 cubic feet

Explanation:

The formula of a volume of a cone:

`V=(1)/(3)\pi r^2H`

r - radius

H - height

We have r = 3 ft and H = 10 ft. Substitute:

`V=(1)/(3)\pi(3^2)(10)=(1)/(3)\pi(9)(10)=\pi(3)(1)=30\pi\ ft^3`

`\pi\approx3.14`

Therefore

`V\approx30\cdot3.14=94.2\ ft^3\approx94\ ft^3`