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प्रश्न
Circumference of a circle of diameter 5 cm is ______.
विकल्प
3.14 cm
31.4 cm
15.7 cm
1.57 cm
उत्तर
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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