Question

A bicycle training wheel has a radius of 3 inches. The bicycle wheel has a radius of 10 inches.Approximately how much smaller, in square inches and rounded to the nearest hundredth, is the area of the training wheel than the area of the regular wheel? *

Answer 1

285.88 square inches

Explanation:

Find the area of the regular wheel and that of the training wheel, and then subtract the latter from the former:

π(10 in)^2 - π(3 in)^2, or

π(100 in^2 - 9 in^2), or

π(91 in^2) square inches. To the nearest hundredth, this comes to

285.88 square inches