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Question -

A field is in the form of a circle. A fence is to be erected around the field. The cost of fencing would be ₹2640 at the rate of ₹12 per metre. Then, the field is to be thoroughly ploughed at the cost of ₹0.50 per m2. What is the amount required to plough the field ? (Take π = 22/7)



Answer -

Cost of the fencing the circular field = ₹2640
Rate = ₹12 per metre 2640
∴ Circumference = (2640/12) = 220 m
Let r be the radius of the field, then = 2πr = 220

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