The radius of circular garden is 70m . a3.5m wide road is built around its outside.what will be the cost on the construction of the road,if the cost is Rs20msquare
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We need to find the area of the circular path. This is equal to the difference between the areas of circle of radius 42/2 = 21 m and 21 - 3.5m = 17.5 m.
Area of circular path = π (21² - 17.5²) = π * 7² * 2.75 m² = 423.33 m²
Cost of laying the road = area * rate = Rs 269.5 π = Rs 846.66
Area of circular path = π (21² - 17.5²) = π * 7² * 2.75 m² = 423.33 m²
Cost of laying the road = area * rate = Rs 269.5 π = Rs 846.66
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