Question
 There are 16 taps which are fitted in a tank .In
which some are inlet pipes and some are Outlet pipes .Each inlet tap has the efficiency to fill the tank in 12 hours and each outlet tap can empty the tank in 8 hours .If all the pipes are kept open when the tank is full it will take exactly 8 hours for the tank to empty. Then find how many of these are inlet pipes?Solution
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