A rectangular sand box is 5m wide and 2m long. How much cubic meters of sand are needed to fill the box up to a depth of 10 cm is

$l=2\text{m},b=5\text{m,}h=\text{10cm=0}\text{.1m}$

Cubic Meters of sand required to fill the box}$=bh$

                                                                         $=2\times 5\times 0.1$

                                                                          $=1m^3$