Question

1. A ball has a 9-inch radius. Leave answers Volume = Surface Area =

Answer 1

The ball in shape of sphere. So radius of sphere is r = 9 in.

The formula for the volume of sphere is,

`V=(4)/(3)\pi(r)^3`

Substitute the value in the formula to obtain the volume of ball.

`\begin{gathered} V=(4)/(3)\pi\cdot(9)^3 \\ =3053.628 \\ \approx3053.63 \end{gathered}`

The formula for the surface area of ball is,

`S=4\pi\cdot(r)^2`

Substitute the value in the formula to obtain the surface area.

`\begin{gathered} S=4\pi\cdot(9)^2 \\ =1017.876 \\ \approx1017.88 \end{gathered}`

So answer.

Volume = 3053.63 inch cube

Surface area = 1017.88 inch square.