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1. The diagonal of a rectangle is 41 cm and its area is 20 sq. cm. The perimeter of the rectangle must be:





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  • By: guest on 01 Jun 2017 05.44 pm
    l2 + b2 = 41 . Also, lb = 20. (l + b)2 = (l2 + b2) + 2lb = 41 + 40 = 81 (l + b) = 9. Perimeter = 2(l + b) = 18 cm.
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