Question

If the circumference of a circle is 72cm. its radius is ________

Answer 1

Answer:

Radius is circumference divided by 2+pi. 72 / (2+pi) = almost exactly 14 cm.

= 14 is answer

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Answer 2

Let,

Radius = r

Given,

Circumferance,c = 72 cm

We know,

$c = 2 \times \pi \times r \\ = > 72 = 2 \times 3.1416 \times r \\ = > 6.2832 \: r = 72 \\ = >r = 72 \div 6.2832 \\ = > r = 11.459(approx.)$

So, radius is 11.459cm(approx.)