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प्रश्न
The area of a circle is 98.56 cm2. Find its circumference.
उत्तर
Let the radius of the circle be r.
Now.
Area = 98.56
⇒ πr2 = 98.56
`⇒ 22/7xx"r"^2 = 98.56`
⇒ r = 5.6
Now,
Circumference `=2pi"r"=2xx22/7xx5.6=35.2 "cm"`
Hence, the circumference of the circle is 35.2 cm.
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