Mathematics · Mensuration

A rectangular lawn measuring 60 m × 40 m has two roads, each 5 m wide, running through the middle of it—one parallel to the length and the other parallel to the breadth. The cost of gravelling these roads at 80 paise per square meter is:

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Rs. 380

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A rectangular lawn measuring 60 m &times; 40 m has two roads, each 5 m wide, running through the middle of it—one parallel to the length and the other parallel to the breadth. The cost of gravelling these roads at 80 paise per square meter is: