Aptitude | Mensuration 2D | Question 7

Jimin was calculating the area of a square. He made a mistake in measuring the side of square, the error of 10% excess is made in calculating the side of a square by him. Find the % error in its area.

(A)

11

(B)

15

(C)

21

(D)

60

Answer: (C)

Explanation:

Area of square = L2
=(1.1L)2 = 1.21 L2
=21 %

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