Question

The area of the playground is $4800$ sq.metres. What is the cost of covering it with gravel $1$ centimetre deep if the gravel costs Rs.$4.80$ per cubic metre?

Answer 1

Volume of gravel
$=$ Base area $\times$ depth
$=4800\times \frac{1}{100}cm$
$(\because 1cm=\frac{1}{100}m)$
$=48$ cu.metre
Total cost $=48\times 4.80$
$=Rs.230.40$