The length of a rectangle is 3 less than twice the width. The perimeter is 114 cm. Find the length and width.

Answer 1

L = 2W - 3

P = 2(L + W) = 114

Substitute Eq 1 into 2, you get

2(2W - 3 + W) = 114

2(3W - 3) = 114

6W - 6 = 114

6W = 120

W = 120 / 6 = 20 cm

L = 2W - 3 = 2(20) - 3 = 37 cm