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InterviewSolution
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15, The diameter of a circular park is 84 m. On its outside, there a 3.5 m wide road.Find the cost of constructing the road at240 per m |
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Answer» 2r=84m (given)r =84/2=42m outer circle's radius=42+3.5=45.5minner circle's radius=42m area of path = (area of outer circle) - (area of inner circle) Radius of the park = 84/2 = 42marea of the park = (22/7)×42×42 = 5544m^2width of road = 3.5m.•.total radius = 3.5+42 = 45.5mtotal area = (22/7)×45.5×45.5 = 6506.5m^2area cover by the road=6506.5-5544= 1062.5m^2total cost of constructing the road=1062.5×240=Rs255000 hit like if you find it useful |
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