Question

A circular pond is to be surrounded by a fence.The radius of the pond is 3.2 m.How many meters of fence is needed to enclose the pond?

Answer 1

≈ 20 m

Explanation:

the circumference (C) of a circle is calculated as

C = 2πr ( r is the radius ) , then

C = 2π × 3.2 = 6.4π ≈ 20

length of fence needed is approximately 20 m