Find the radius of a circle whose circumference is 57.2 cm. – InterviewSolution

1.

Find the radius of a circle whose circumference is 57.2 cm.

Answer»

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

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