The radius of a circular park is 70 m. There is 7 m wide road outside. Find the cost of leveling the road at the rate of Rs 2.30 per meter sq
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Radius of a circular park excluding the road
=70m
And width of the road = 7m
Therefore, radius of a circular park including the road
= (70+7) =77m
Area of a circular park including the road
=πr²
=22/7*77*77
= 18634m²
Area of a circular park excluding the road
=πr²
=22/7*70*70
=15400m²
.'.area of the road=(18634-15400) m²
=3234m²
. '. Cost of levelling the road = 3234*2.30
=rs.7438.2
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