Question

Cho is making a rectangular garden, where the length is x feet and the width is 2x + 8 feet. He wants to add garden stones around the perimeter of the garden once he is done.

If the garden is 5 feet long, how many feet will Cho need to cover with garden stones?

Cho will need to cover _______ feet with garden stones.

Answer 1

38 feet

Explanation:

P(x) = ℓ(x) + ℓ(x) + w(x) + w(x)

= x + x + (4x - 1) + (4x - 1)

= (x + x + 4x + 4x) + (-1 -1)

= 10x - 2

P(4) = 10(4) -2 = 38

The perimeter is 38 feet when the length is 4 feet long, so Cho will need to

cover 38 feet with garden stones.