1.

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

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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