volumes help?

Question

I have a maths question this is my weakness.

march rain fall 92 mm
for the whole of march an open toped container was left to collect water. The box was 220 mm long, 155 mm wide and 210 mm high. what was the total volume of water in the container at the end of the month. Who ever works this out could they please show their working. thanx

Answer 1

The layer of water is 220mm long by 155mm wide by 92mm high. Ignore the 210mm; it's irrelevant here.
volume = 220*155*92 mm³
you can do the calc.

Answer 2

the volume of water is

220 x 155 x 92 = 3137200 cu mm