Question

Find the radius of a circle who circumference is 57.2
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Answer 1

heya mate!!! lets do it

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 whoes circumference-is-57-2-cm

Answer 2

Answer:

The radius of circle is 9.1.

Step-by-step explanation:

$2\pi r = 57.2\\\\2 \times \dfrac{22}{7} \times r = 57.2\\\\\dfrac{22}{7} \times r = \dfrac{57.2}{2}\\\\\dfrac{22}{7} \times r = 28.6\\\\r = \dfrac{28.6 \times 7}{22}\\\\r = 1.3 \times 7\\\\r = 9.1$

Hence, radius of the circle is 9.1.