Question 182
The percentage increase in the area of a rectangle, if each of its sides is increased by 20% is equal to
Solution
let the length of rectangle be L units and breadth be B units.
So area of rectangle = L x B
As both length and breadth has been increased by 20%
So new length = 1.2L
New breadth = 1.2B
New area = 1.2L x 1.2B = 1.44LB
Percentage increase in area = $$\frac{1.44LB - LB}{LB}$$×100 = 44%
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