1.

Two pipes can fill a tank in 10 hrs and 12 hrs each whereas a third pipe will empty the tank completely in 20 hrs. If all the three pipes work together, how long will it take for the tank to fill up?

Answer»

Two pipes can fill a tank in 10 hrs and 12 hrs each whereas a third pipe will empty the tank completely in 20 hrs. If all the three pipes work together, how long will it take for the tank to fill up?




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