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प्रश्न
Find the area of a circular field that has a circumference of 396m.
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उत्तर
The Circumference of a Circle with radius r = 2πr
Here, Circumference of a Circle = 369
⇒ 2πr = 396
⇒ r = `(396)/(2pi)`
= `(396 xx 7)/(2 xx 22)`
= 63m
The Area of a Circle with radius r = πr2
⇒ The Area of a Circle with radius 63m
= π(63)2
= `(22)/(7) xx (63)^2`
= `(22)/(7) xx 3969`
= 12,474m2.
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