the length of a rectangle is increased by 10% and the breadth is decreased by 10% what percentage of area of the former rectangle is that of the new rectangle?
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let length and breadth of rectangle is l and b
according to question
new length =l+l*10%=11/10l
new breadth=b-b*10%=9/10b
area of new formed rectangle = new length*new breadth=11/10l*9/10b=99/100lb
and area of old rectangle =lb
percentage of area new rectangle=(area of new reactangle/area of rectangle)*100
(99/100)lb*100/lb
99% area of old rectangle
change of
area of new rectangle= area of old rectangle decreased by 1%
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