Gallons
Cubic meters are the best unit to measure the capacity of a shark tank because volume measurements like cubic meters can accurately represent the three-dimensional space inside the tank. Square meters measure area, not volume, and would not provide an accurate representation of the tank's capacity.
You would use the metric unit "liters" to measure the capacity of a hot water tank.
In the US, a fish tank's capacity is measured in gallons.
litres
Liter
You use litres to measure the capacity of a car's gas tank.
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The basic metric unit of measure for measuring the capacity of a pitcher is liters (L).
you would use gallons to measure the capacity of a bathtub
litres
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