Question

8. The cost of fencing a circular field at the rate of Rs 24 per metre is Rs. 5280. Find the
radius of the field.
10. If the perimeter and the area of a circle are numerically equal, then find the radius of the
circle.​

Answer 1

Q10. Answer

As we know that,

Perimeter of circle =2πr

Area of circle =πr

2

Given that the perimeter and area of circle are numerically equal.

Therefore,

πr

2

=2πr

r

2

−2r=0

r(r−2)

⇒r=0 or r=2