The circumference of the two circles is 308 cm and 440 cm respectively. What is the difference between their radii?

21 cm 49 cm 35 cm 14 cm

21 cm

We know that, Circumference of the circle = 2πr Now, according to the question, = 308 = 2 × \(\frac{22}{7}\) × r1 = r1 = 49 cm Also, 440 = 2 × \(\frac{22}{7}\) × r2 = r2 = 70 cm Difference between the radius and the circle = r2 - r1 = 70 - 49 = 21 cm