Question

The diameter of a lake is 20 meters. I swim half way around the lake. How far did I swim?

Answer 1

Swimming half way around implies half of the circumference.

Circumference = pi x diameter

C = pi x 20

C = 20pi

20pi / 2 = 10pi

You swam 10pi meters = 31.42 meters.

Hope this helps!! :)

Answer 2

Circumference is c=dxpi

C= 20x3.14

C= 62.8

Halfway around the lake it 31.4

Hope this helps :)