Question

Q 35 If the radius of a circle is increased by 11%, then the percentage increase in its area is:
Ops: A.
None of the mentioned options.
0 14.49%
0 16%
O 23.21%​

Answer 1

Answer:

let the original radius of the circle be 'r'

so the area of circle will be

$\pi {r}^{2}$

after 11% increase the radius will be 111r/100

so the new area will be

$12321 {r}^{2} \div 10000$

so the percentage increase in area will be new area - original area= 23.21%