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There are 2 identical tubs, tub A and tub B on a table.
Both tubs contained some water.
Tub B is `31/40` filled with water and tub A is `2/5` filled with water.
The mass of tub A with water in it is `6/11` of the mass of tub B with water in it.
The total mass of both tubs with the water contained within them was measured to be 255 kg.
What is the total mass of 2 identical empty tubs?