The length of a rectangular plot is increased by 25%. To keep it’s area uncharged the width of the plot should be___________?

Areas 07/01/2021

A. Kept unchanged
B. Increased by 25%
C. Increased by 20%
D. Reduced by 20%

Explanation:

Let the length be x metres and breadth be y metres

Then it’s area =(xy)m2

New length =(125/100 x)m =(5x/4)m.

Let the new breadth be 2 metres

Then xy 5x/4 x 2 => 2 = 4/5 y

Decreased in width =(y -4/5 y) = y/5 metres

Decreased % in width =(y/5 x 1/y x 100)% = 20%

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