Question

The diameter of a spherical balloon is 9 inches. What’s the volume of the balloon?85254339382

Answer 1

Given:

The diameter of the sphere is 9 inches.

$\text{Radius}=\frac{diameter}{2}=\frac{9}{2}\text{inches}$

The volume of the sphere is

$V=\frac{4}{3}\pi r^3$

Substitute r =9/2 in the formula, we get

$V=\frac{4}{3}\times3.14\times(\frac{9}{2})^3$

$V=\frac{4}{3}\times3.14\times\frac{9\times9\times9}{2\times2\times2}$

$V=3.14\times\frac{3\times9\times9}{2}$

$V=381.5$

$V=382in^3$

Hence the volume of the ballon is 382 cubic inches.