Circumference of a given circle is 57.2 cm
∴C = 57.2 cm
Let the radius of the given circle be r cm
Then,
= C = (2πr) units
= r = (C/2π)
= r = (57.2/ (2 × (22/7)))
= r = (57.2/2) × (7/22)
= r = (28.6 × 0.3182)
= r = 9.1 cm
Hence, the radius of a circle is 9.1 cm
