Question

The area of a courtyard is 3750 m². Find the cost of covering it with gravel to a height of 1 cm if the gravel costs Rs 6.40 per cubic metre.

Answer 1

$1cm=0.01m$
Volume of the gravel used $=\mathrm{Area}\times H\mathrm{eight}=(3750\times 0.01)=37.5{\mathrm{m}}^3$
Cost of the gravel is Rs 6.40 per cubic meter.
∴ Total cost $=(37.5\times 6.4)=$Rs 240