The circumference of the two circles is 198 cm and 352 cm respectively. What is the difference between their radii?

24.5 cm

We know that,

Circumference of the circle = 2πr

The circumference of the two circles = 198 cm and 352 cm

According to the question,

2πr₂ - 2πr₁ = 352 - 198

= 2π(r₂ - _r1) = 154

= π(r₂ - r₁) = 77

= (r₂ - r₁) = 77 × \(\frac{7}{22}\) 

= (r₂ - r₁) = 24.5