Question

Not sure if i chose the right one?

Answer 1

113.04 ft³ is correct

Explanation:

The volume (V) of a cone is calculated as

V =
`(1)/(3)`πr²h ( r is the radius and h the height )

There are 2 cones to be summed one with h = 7 , the other with h = 5

Thus

V =
`(1)/(3)` π × 3² × 7 +
`(1)/(3)`π × 3² × 5

=
`(1)/(3)` × 3.14 × 9 (7 + 5)

= 3.14 × 3 × 12

= 113.04 ft²