Question

John runs a circular route around a lake. The jogging path had a radius of 1/8 mile and he usually runs exactly 4 laps. Approximately how far does John run in one workout? *1.57 miles3.14 miles4.71 miles6.28 miles9.42 miles

Answer 1

The path is circular. The distance covered in one lap is the same as the circumference of the circle. The formula for finding the circumference of a circle is

circumference = 2 x pi x r

r = 1/8 = 0.125

pi = 3.14

one lap = 2 x 3.14 x 0.125 = 0.785

The distance covered in running 4 laps = 4 x 0.785 = 3.14 miles