There are two circles of different radii. The area of a square is 196 sq.cm, whose side is half the radius of the larger circle. The radius of the smaller circle is three-seventh that of the larger circle. What is the circumference of the smaller circle?
Q1. There are two circles of different radii. The area of a square is 196 sq.cm, whose side is half the radius of the larger circle. The radius of the smaller circle is three-seventh that of the larger circle. What is the circumference of the smaller circle?
Answer: 24 π cm
Explanation: Side of square = √196 = 14 cm = half the radius of larger circle, so radius = 28 cm. Smaller circle radius = 3/7 × 28 = 12 cm. Circumference = 2π × 12 = 24π cm.