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A ground is in the form of isosceles trapezium with parallel sides measuring \(42 \ m\) and \(36 \ m\) long. The distance between the parallel sides is \(30 \ m\). Find the cost of levelling it at the rate of \(₹135\) per \(sq. \ m\).
Answer:
Area of the ground \(=\) \(sq. \ cm\)
The cost of levelling the ground \(=₹\)
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