Question

Find the radius of a circle if 2 m is the area of the circle.

(a) √0.83 m

(b) 5 m

(c) √0.63 m

(d) √38 m

I have been asked this question by my school teacher while I was bunking the class.

This key question is from Perimeter and Area of a Circle topic in portion Area Related to Circles of Mathematics – Class 10

Answer 1

The correct answer is (c) √0.63 m

The explanation is: The area of the circle (A) = πr^2

2 = \(\frac {22}{7}\) × r^2

r^2 = \(\frac {7}{22}\) × 2

r = √0.63 m