Practice!

Sample Problem

There is a lawn depicted in the figure below. Kate can walk 3 feet per second. How much time will she take to walk around the lawn? Round your answer to the nearest second. (Use π = 3.14)

She will take seconds.

Solution

Circumference of the circle:

3.14 × 6 in × 2 = 37.68 in

The perimeter of the figure:

37.68 in ÷ 4 + 6 × 2 in + 10 in × 2 = 41.42 in

41.42 ÷ 3 = 13.8, which rounds up to 14 seconds.