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The percentage increase in the area of a rectangle, if each of its sides is increased by 20% is: ?->(Show Answer!)
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1. The percentage increase in the area of a rectangle, if each of its sides is increased by 20% is:





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  • By: guest on 01 Jun 2017 05.44 pm
    Let original length = x metres and original breadth = y metres. Original area = (xy) m2. New length = 120 x m = 6 x m. 100 5 New breadth = 120 y m = 6 y m. 100 5 New Area = 6 x x 6 y m2 = 36 xy m2. 5 5 25 The difference between the original area = xy and new-area 36/25 xy is = (36/25)xy - xy = xy(36/25 - 1) = xy(11/25) or (11/25)xy Increase % = 11 xy x 1 x 100 % = 44%. 25 xy
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