When the breadth of a certain rectangle is shortened by a metre, the area is
decreased by 15 sq. metres. What is the length of the rectangle?
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Answer:Area of rectangle = l*b
let l *b =a-----(1)
l * (b-1) =a -15
= l * (b-1) = l *b -15 (from 1)
= l*b -l = l*b -15
l*b cancel on both sides
l= 15 m
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