# Grantham PHY220 Week 1 Assignment Problem 3

### What is the surface area of a sphere of diameter $2.4\times 10^2$ cm?

Solution:

$SA=4\pi r^2=4\pi \left(\frac{2.4\times 10^2\:cm}{2}\right)^2=1.8\times 10^5\:cm^2$