Question

Mrs. Drew wants to build a square sandbox with an area of 400 square feet. What is the total length of wood Mrs. Drew needs to make the sides of the​ sandbox?

Answer 1

80 ft

Explanation:

The area can be used to find the side length. The perimeter is the sum of side lengths.

A = s² . . . . . the area of a square is the square of its side length

s = √A . . . . the side length is the square root of the area

s = √(400 ft²) = 20 ft

The perimeter is the sum of the four equal-length sides of the square, so is ...

P = 4s

P = 4(20 ft) = 80 ft

Mrs. Drew needs 80 ft of wood to make the sides of the sandbox.