Answers

2016-07-24T01:31:05+08:00
Let x be the width. Then, the length should be 3x. And the area is 108 cm^2

l = 3x 
w = x

WL = A
x(3x) = 108 
3x^2 = 108 
3x^2/3 = 108/3
x^2 = 36
√(x)^2 = √36
x = 6

Therefore, 

L = 3x
L = 18

W = 6

WL = A
6(18) = 108 cm^2
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