### Home > CALC > Chapter 4 > Lesson 4.4.1 > Problem4-125

4-125.

Imagine a hollow rubber ball. The rubber is 1-inch thick and the radius is 3 inches.

Volume = big sphere − small sphere

$\frac{4}{3}\pi(4)^3-\frac{4}{3}\pi(3)^3=\frac{148}{3}\pi \text{ un}^{3}$