The cost of a fencing around a circular field at the rate of Rs. 45 per meter is Rs. 15,840. Then the area of the field, in square meters, is (Take $$\pi = \frac{22}{7}$$)
Circumference of the field = 15840/45 = 352 meters
Also, 2*(22/7)*R = 352
R = 56 meters
Area of the field = (22/7)*56*56 = 9856 sq. meters
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