A water container is 1/6 full, 36 litters is poured, now it is 2/3 full how many litres of water is there

Question

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Answer 1

2/3 - 1/6 = 4/6 - 1/6 = 3/6 = 1/2

 

If 36 liters is half the tank, thr entire tank holds 72 liters.