Question
Tick the correct answer in the following: If the perimeter and the area of a circle are numerically equal, then the radius of the circle is
(A) 2 units (D) π units
(C) 4 units (D) 7 units.
Solution
Let r be the radius of the circle then,
Perimeter = 2 πr
and Area = πr2
It is given that
Perimeter of circle = Area of circle
⇒ 2πr = πr2
⇒ r = 2 units
Hence, right option be (A): 2 units.
