Question

The cost of fencing a circular field at the rate of 36 per metre is < 15840. If the field is to be ploughed at the rate of 1 per m?, then find the cost of ploughing the field.

Answer 1

Step-by-step explanation:

Let the radius of the circle be r.

Then,(2πr)×36=15840

Or,2×22/7×r=15840/36=440

Or,22/7×r=440/2=220

Or,x=220×7/22=70m

Area=πr^2 =22/7×70×70=15400m^2

Cost=15400×1=15400/-

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