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प्रश्न
The diameter of a circular field is 56 m. Find its circumference and cost of fencing it at the rate of ₹80 per m. (Take π =`22/7`)
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उत्तर
Given, Diameter of a circular field = 56 m
∴ Radius =`56/2` = 28 m
Circumference of the circle = 2πr
= `2xx22/7xx28` m
= 2 × 22 × 4 m
= 176 m
The cost of fencing 176 m is,
= 176 m × ₹80 per m
= ₹14,080
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