If 7 pipes fill a tank in 8 hours, then 4 pipes will fill it in ......... hours
Pipes A and B can fill the tank in 7 and 8 hours respectively. Pipe C can empty it in 16 hours. If all the three pipes are opened together, then the tank will be filled approximately in
If one pipe A can fill the tank in 10 hours then 4 pipes each of efficiency 20% as that of Pipe A can fill the same tank in how many hours?