50 cm
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500mm = 50cm
500mm
0.5 of a meter is equivalent to 50 centimeters. This is because 1 meter is equal to 100 centimeters, so half of a meter would be half of 100 centimeters, which is 50 centimeters. Therefore, 0.5 meters is the same as 50 centimeters in length.
If the tank is a cube, and each edge is 500mm long, then the volume of the tank is50cm x 50cm x 50cm = 125,000 cm3 = 125 litres.
2 centimeters