Find the cost of fencing a circular park whose radius is 12 m at the rate of Rs 45 per metre.
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Step-by-step explanation:
Formula
Circumference\of\ a\ circle = 2\pi rCircumference\of a circle=2πr
Where r is the radius of the circle .
As given
The cost of fencing circular garden of radius 25 meters at the rate of ₹ 3 per metre.
π = 3 .14
Put in the formula
Circumference\of\ a\ circle = 2\times 3.14\times 25Circumference\of a circle=2×3.14×25
= 157 m
Cost of the fencing = Circumference of the circle × Cost per meter
= 157 × 3
= ₹ 471
Therefore the cost of the fencing is ₹471 .
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