Question

if the length of the rectangle is increased by 20% and the width of rectangle decreased by 20%, then the area of rectangle is..

Answer 1

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let the length be l
let the breadth be b
area =l*b
new length=120/100×l
new breadth=80/100×b
new area = 96/100×l×b
therefore,new area is decreased by 4%
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by @strange