Question

A circular patio has a radius of 4 yards. The patio is expanded so that the

radius increases by 2 yards. By how many square yards does the area of the
patio increase?

Answer 1

20pi or 62.83

Explanation:

when r=4

pi r^2

16pi

when r=6

pi r^2

36pi

36pi-16pi=20pi or 62.83