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प्रश्न
The circumference of a circular field is 308 m. Find is:
(i) Radius
(ii) Area.
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उत्तर
Let r be the radius of the circular field
(i) 2πr = 308
⇒ r = `[308]/ [2π]`
⇒ r = `(308)/(2) xx (7)/(22)`
⇒ r = 49 m
(ii) area = πr2
= `22/7 xx ( 49 )^2`
= 7546 m2
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