Question

Mr. Drew wants to build a square sandbox with an area of 81 square feet. What is the total length of wood Mr. Drew needs to make the sides of the sandbox?

Answer 1

Answer: 36 feet of wood

Explanation:

P=perimeter. P=total length of wood

s= side length. A=area

A=s^2

81=s^2

s^2=9^2

s=9

P=4s

P=4(9)

P=36 feet of wood

Answer 2

P = 36 ft

Explanation:

The given length is,

→ a = ?

Formula we use,

→ A = a²

Now the length of one side is,

→ A = a²

→ a² = 81

→ a = √81

→ [ a = 9 ]

The total length of wood needed is,

→ P = 4a

→ P = 4 × 9

→ [ P = 36 ]

Hence, the total length is 36 ft.