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The area of a circular plot is 346.5 m^(...

The area of a circular plot is `346.5 m^(2)`. Calculate the cost of fencing the plot at the rate of Rs 6 per metre

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Area of plot `= 346.5 m^(2)`
`rArr pi r^(2) = 346.5 m^(2) " " rArr r^(2) = (346.5 xx 7)/(22)`
`rArr r^(2) = 110.25 " " rArr r = 10.5 m`
Circumference of plot `= 2 pi r = 2 xx (22)/(7) xx 10.5 = 66 m`
Cost of fencing of = Circumference `xx` Cost of fencing per metre
`= Rs 66 xx 6 = Rs 396`
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