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How much will the area increase if each side of rectangle is increased by 20%?My friend Vipul and I asked this Question but we didn't understand? So please solve this question in detail. |
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Answer» Lets, Original length = x m Original breadth = y m Original are = l x b = x m x ym = xy m2 Each side increased by 20% Then, length = 120x/100 = 6x/5 m breadth = 120y/100 = 6y/5 m Area = l x b = 6x/5 x 6y/5 m2 = 36xy/25 m2 Different = 36xy/25 m2 - xy m2 = (36xy/25 - xy/1) m2 = (36xy - 25xy)/25 m2 = 11xy/25 m2 Increase% = (Different/ original) x 100% = ((11xy/25 ) / xy) x 100% = (11xy/25) x (1/xy) x 100% = 44% |
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