Question

The circumference of a circle is 37.5km.
Find the length of the radius.
Give your answer rounded to 3 SF.​

Answer 1

Circumference of a circle =

$2\pi \: r$

37.5 = 2πr

37.5 = 2× 3.14r

37. 5 = 6.28 r

r = 37.5 ÷ 6.28

r = 5.97

radius = 5.97

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