Chapter 12, Problem 13CR

To determine

To find:The approximate area of the sphere.

Answer to Problem 13CR

The approximate area of sphere is $616{\text{m}}^{\text{2}}$ .

Explanation of Solution

Given information:The radius of the sphere is $7\text{m}$ and the value of $\pi \approx \frac{22}{7}$ .

Calculation:

The formula to find the area of sphere with radius $r$ is:

  $A=4\pi r^2$

Substitute 7 for $r$ in the above formula to find the area of sphere.

  $\begin{array}{c}A=4\left(\frac{22}{7}\right){\left(7\right)}^2\\ A\approx 616{\text{m}}^{\text{2}}\end{array}$

Therefore, the approximate area of sphere is $616{\text{m}}^{\text{2}}$ .