Question 1129004

2L + 2W = 56
2(W+12) + 2W = 56
4W + 24 = 56
4W = 32

W = 8  —> L = 8+12 = 20

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Ans:  Width is 8cm, Length is 20cm
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Check:  2*8 + 2*20 = 16 + 40 = 56   ✔