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[" 38) A rectangular lawn "75m" by "60m"...

[" 38) A rectangular lawn "75m" by "60m" has two roads,each road "4m" ."],[" wide,running through the middle of the lawn,one parallel to length "],[" and another parallel to breath as shown in the figure.Find the cost of "],[" gravelling the road at Rs."50" per "m^(2)" ."]

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