23-06-2017
Mathematics

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musiclover10045 musiclover10045

23-06-2017

area = 77

L = 2W+3

area = L x W

77 = 2W+3 x W

77 = 2w^2 + 3W

2w^2 + 3W - 77 =0

(2w-11)(w+7)=0

2W-11=0

2w=11

w=5.5

l = 2x5.5+3 = 14

14 x 5.5 = 77

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