A landscaper has 5 m3 of gravel to use as the base of a patio. If the gravel base is 10 cm deep and the patio has the dimensions shown, does she have enough gravel? How much extra gravel does she have, or how much more will she need? -1.2m
-960m
-0.8m
-9.6m

If the water from the question above drains out at a rate of 60m3/h , how much water is left after 2.5 h? What is the new depth of water?

Later, the depth of the water is 0.2 m. For how long has the tank been draining?