The circumference of the two circles is 308 cm and 440 cm respectively. What is the difference between their radii?
Answer & explanation
Correct answer: option 1
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