Practice!

Sample Problem

Bob has a bicycle. The diameter of the wheel of his bicycle is 1.5 ft. He rides this bicycle from home to school. The distance from his home to school is 4710 ft. How many full revolutions does his bicycle wheel make in this distance? (Use π = 3.14)

  revolutions

Solution

Circumference of the circle:

3.14 × 1.5 ft = 4.71 ft

∴The number of revolutions the wheel makes:

4710 ÷ 4.71 ft = 1000 r

It will revolve 1000 times