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Circumference of a circle of diameter 5 cm is ______.

#### Options

3.14 cm

31.4 cm

15.7 cm

1.57 cm

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#### Solution

Circumference of a circle of diameter 5 cm is **15.7 cm**.

**Explanation:**

Given, diameter of a circle = 5 cm

∴ Radius = `5/2` cm ......`[∵ "Radius" = "Diameter"/2]`

Now, circumference = 2πr

= `2 xx 22/7 xx 5/2`

= `110/7`

= 15.7 cm

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