Question

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.

Answer 1

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.