A rectangular field is seven times as long as it is wide. If the perimeter of the field is 1440 feet, what are the dimensions of the field?

Answer 1

L = 630

W = 90

For a rectangle, Perimeter = 2 * Width + 2 * Length

P = 2W + 2L

L = 7W

P = 2W + 2(7W)

1440 = 2W + 14W

1440 = 16W

Divide both sides by 16

1440/16 = W

90 = W

630 = 7W

Checking,

1440 = 2(90) + 2(630)

1440 = 180 + 1260

1440 = 1440

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