Question: What is the volume of a hemisphere with a radius of 7 cm?

Options:

1. 143.67 cm³
2. 107.76 cm³
3. 153.94 cm³
4. 98.17 cm³

Correct Answer: 143.67 cm³

Solution:

Volume = (2/3)πr³ = (2/3)π(7)³ = (686/3)π ≈ 143.67 cm³.