Question

find the length of the radius of a circle whose circumference is 20 cm. round your answer to the nearest tenth

Answer 1

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Answer 2

The radius is 3.2 cm

Step-by-step explanation:

Circumference of circle =$2 \pi r$

We are given that circumference is 20 cm.

So, $2 \pi r =20$

$2 \times \frac{22}{7} \times r = 20$

$r=\frac{20 \times 7}{22 \times 2}$

r=3.2

Hence the radius is 3.2 cm

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Find the circumference of a circle with radius 8.3 ft. Round to the nearest tenth

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