If the radius of a circle is increased by 6%, then the area of the circle is increased by -
If the radius of a circle is increased by 6%, then the area of the circle is increased by - Correct Answer 12.36%
Initial area = πr2 New radius = r + 6% of r = 1.06r So, new area = π(1.06r)2 = 1.1236πr2 So, percentage of increase in area = (1.1236πr2 - πr2) / πr2 x 100% = 12.36%