Question

The size of a bicycle is determined by the diameter of the wheel. You want a 22-in bicycle for your birthday. What is the area of one of the wheels?

Answer 1

Area of a circle is pi*r^2.

Here the diameter is 22 inches, so the radius is 11 inches.

The area of the bike wheel is thus A = pi * (11 inches)^2 = 121*pi sq in