The percentage increases in the area of a rectangle, if each of its sides are increased by 20% is
A 40%
B
42%
44%
D
46%
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Answer:
Initial length be l.
Initial breath be b
Initial Area = l×b
After increasing,
New length = l+20% of l=l+5l=56l
New breath = b+20% of b=b+3b=56b
New area = 2536lb
% change in area = lb2536lb−lb×100=2511×100=44%
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