Which Tank will be filled first? # Water Tank Puzzle

Answer of the puzzle Which Tank will be filled first is : K

How : L and G are not possible answer as water supply is blocked from N.

Also there is no water coming from D to I as the supply is blocked.

So the only possible answers are K or N. But N will take more time than K to get filled up.

As we mentioned in the beginning that each tank takes 4 minutes to get filled up completely, so based on that when water will take route A-B-C-I-H-F-K it will take complete 8 minutes to fill up tank K. (1 minute for tank A as the outlet is at the 1/4 level, o minute at tank B and C, 1 minute at tank I, 1 minute at tank H, 1 minute at tank F and 4 minutes at tank K ).

When water will follow path E-D-M-N it will take 9 minutes. 3 minutes at tank E, 2 minutes at tank D, 0 minute at tank M and 4 minutes at tank N. so total 9 minutes.

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