Question

If circumference of a circle is 6.28 cm then what is the radius of the circle?

(a) 2 cm

(b) 1 cm

(c) 4 cm

(d) 3 cm

This question was addressed to me in a national level competition.

I want to ask this question from Applications of Linear Equation (Just Solving the Equations) in division Linear Equations in One Variable of Mathematics – Class 8

Answer 1

Correct answer is (b) 1 cm

The explanation is: Circumference of a circle = 2 × π × Radius

6.28 = 2 × 3.14 × Radius

Radius = 1.