SOLUTION: the perimeter of a rectangle is 160 cm , the length is 4 cm less than three times the width, find the length and width

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Question 359555: the perimeter of a rectangle is 160 cm , the length is 4 cm less than three times the width, find the length and width
Answer by Jk22(389) About Me  (Show Source):
You can put this solution on YOUR website!
l = 3w-4 : length equals 3 times width minus four

p = 2l + 2w = 6w - 8 + 2w = 8w - 8 = 160

hence w - 1 = 20, w = 21 cm

=> l = 63 - 4 = 59 cm

Verification : p = 59*2 + 2*21 = 118 + 42 = 160 cm