Find the cost of fencing the circular ground having diameter is 84 m, if the cost of fencing is Rs.5 per meter.

Rs.1100

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Rs.1200

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Rs.1320

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Rs.1240

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Solution

The correct option is C Rs.1320
Circumference of circle $= 2 π r$
Circumference of circle $= 2 \times \frac{22}{7} \times 42 m = 264 m$ . Cost of fencing circular ground $= 264 \times 5 = R s . 1320$

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