Areas related to Circles ncert solutions Chapter 12 Exercise 12.1 Question 5
5. Tick the correct answer in the following and justify your choice: If the perimeter and the area of circle are numerically equal, then the radius of the circle is
(A) 2 units (B) units (C) 4 units (D) 7 units
Answer is (A)
According to the given condition, we have
We ignore r =0 units because if radius of circle is 0 then it becomes a point. Point does not have length, breadth, circumference or area. It is zero dimensional.
Therefore, radius of circle = 2 units