Question

7 in.Rounded to the nearest tenth, find:Surface Area =square inchesVolume =cubic inchesBlank 1:Blank 2:

Answer 1

The Solution.

By formula, the surface area of the given figure is

`S.A=4\pi r^2`
`\begin{gathered} SA=\text{surface area}=\text{?} \\ r=7\text{ inches} \\ \pi=3.14 \end{gathered}`
`S\mathrm{}A=4*3.14*7^2=4*3.14*49=615.44\approx615.4inches^2`

b. By formula, the volume of the given figure is

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

Where,

`r=7\text{ inches,}\pi=3.14,V=volume=?`

Substituting the values in the formula, we have

`V=(4*3.14*7^3)/(3)=(4*3.14*343)/(3)=(4308.08)/(3)`
`V=1436.0267\approx1436.0inches^3`

Hence, the correct answers are:

a. Surface area = 615.4 square inches

b. Volume = 1436.0 cubic squ