Easy
The length, breadth and height of a water tank is 1 meter each. How many litres of water can it hold?
The length, breadth and height of a water tank is 1 meter each. How many litres of water can it hold?
Volume = 1m x 1m x 1m = 1 cubic metre = 1000 litres (since 1 cubic metre = 1000 litres).
Re-check your working by substituting the answer back into the original question.