A pipe can fill a tank in 10 hours. The other pipe can empty it in 20 hours. Both are opened together. In how much time will tank be filled?

A tap can fill a tank in 10 hours and another tap can empty the tank in 15 hours. If both the taps are opened together how much time will be taken to fill (2)/(3) of the tank.

Out of 7 pipes. Some one inlets and some one out- lets. An inlet pipe can fill a tank in 5 hours amd one outlet pipe can empty tank in 4 hours. It all the pipes are opened together then the tank get filled in 20 hours. Find the number of inlet and outlets pipe.

Pipe A can fill a tank in 6 hours. Pipe B can empty it in 15 hours. If both the pipes are opened together, then the tank will be filled in how many hours?

Pipe A can fill a tank in 12 hours. Pipe B can empty it in X hours. If both the pipes are opened together, then the tank will be filled in 30 hours. Find X

A tank has 8 pipes. Out of which some one inlet and some one outlets. Inlet pipe can fill a tank in 8 hours and an outlet pipe can empty the tank in 6 hours. If all pipes are opened together then the tank get filled in 8 hours. Find the number of inlets and outlets pipe.

Pipe A can fill a tank in X hours. Pipe B can empty it in 15 hours. If both the pipes are opened together, then the tank will e filled in 7 hours and 30 minutes. Find X

A pipe can fill a tank in 5 h, while another pipe can empty it in 6 h. If both the pipes are opened simultaneously, how much time will be taken to fill the tank?

A pipe can fill a tank in 20 min. Another pipe can empty that tank in 25 min. If both are opened atternatively then the tank will be filled in?