The length of a rectangle is increased by 60 %. By what percent would the width have to be decreased to maintain the same area?

A. 37 ½ %
B. 60 %
C. 75 %
D. none of these

Explanation:

Let length = 100 m.

Breath = 100 m.

New length = 160 m.

New breath = x meters

Then, = 160 × x = 100 × 100

(or) X = (100 ×100)/160 × 125/2

Decrease in breadth = (100- 125/2) % = 37 ½ %

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