If the side of a square is increased by 25%, then how much percent does its area get increased?

• A. 125
• B. 50
• C. 156.25
• D. 56.25

Answer: (D)

Let area 100 m2Then, side = 10 m New side = 125 % of 10= (125/100) x 10= 12.5 m New area = 12.5 x 12.5 m2=(12.5)2 sq. m? Increase in area = (12.5)2 - (10)2 m2= 22.5 x 2.5 m2=56.25 m2% Increase = 56.25 %