Question

What is the circumference of a circle if the radius is 7 m?

(a) 8 m

(b) 2 m

(c) 44 m

(d) 22 m

This question was posed to me during an online exam.

My question is taken from Perimeter and Area of a Circle in division Area Related to Circles of Mathematics – Class 10

Answer 1

The correct answer is (c) 44 m

For explanation I would say: The circumference of a circle (C) = 2πr.

C = 2 × \(\frac {22}{7}\) × 7

C = 44 m