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प्रश्न
The area of a playground is 3650 m2. Find the cost of covering it with gravel 1.2 cm deep, if the gravel costs Rs. 6.40 per cubic metre.
उत्तर
The area of the playground is 3650 m2 and the gravels are 1.2 cm deep. Therefore the total volume to be covered will be:
3650 x 0.012 = 43.8 m3.
Since the cost per cubic meter is Rs. 6.40, therefore the total cost will be:
43.8 x Rs. 6.40 = Rs. 280.32.
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