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Length and breadth of a rectangle are increased by 40% and 70% respectively. What will be the percentage increase in the area of rectangle?1). 1182). 1103). 1384). 128 |
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Answer» Let LENGTH and breadth of RECTANGLE be a and b respectively Initial AREA = length × Breadth = ab New length = a + 40% of a = 1.4a New breadth = b + 70% of b = 1.7b New area = (1.4a) × (1.7b) = 2.38ab ∴ Required % = {(2.38ab – ab/ab} × 100 = 138% |
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