The lenglth of a rectangle is increase by 25 % by what percent would the width has decreased to maintain the same area ?
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Initial area lb = A
New area after increased length of 1.25 l is 1.25 l b
To bring back the original area ,we have to multiply
1.25 lb by (1/1.25) so that 1.25 lb becomes = lb.
Thebreadth is to be modified as b / 1.25 =0.8 b
That is 0.2 b has to be decreased.
0.2b / b = 0.2 = 20% has to be decreased.
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