Question

A training field is formed by joining a rectangle and two semicircles, as shown below. The rectangle is 84 m long and 55 m wide. What is the length of a training track running around the field? (Use the value 3.14 for pi, and do not round your answer. Be sure to include the correct unit in your answer.)

Answer 1

340.7m

Explanation:

Length of track will be the sum of the lengths of the top and bottom sides of the rectangle, plus the distance around the curved edge of each semicircle.

1. 84m + 84m = 168m

2. distance around curved edge of each semicircle = circumference of the whole circle: C=πd, and d = 55m; so C = 3.14×55m = 172.7m