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The length of a rectangle is increased by (x+2.5) percent. Its breadth is decreased by (x-2.5) percent. Find x if its area is unaltered. |
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Answer» Answer: Correct OPTION is A 37 2 1
% LET length of rectangle =100 m breadth =100 m Original Area =100×100=10000m 2
New length =160 m Let new breadth =x New Area =160x Since area of rectangle remains same ∴10000=160x ∴x= 2 125
Decrease in breadth =(100− 2 125
)% =37.5% |
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