If the side of a square is increased by 10%, its area increased by k%. Find the value of k.
Answer & explanation
Correct answer: option 1
Let the side of square be = 10, area = (s)2 which comes out to be 100
After increase in the side by 10%, side = 11, area = 121
Thus, increase in the area = 121 - 100 = 21
Percentage increase in area = \(\frac{21 }{ 100}\) x 100 = 21%