6 pipes fill tank in 120 minutes, then 5 pipes will it in

If 5 pipes can fill a tank in 144 minutes , then 6 pipes can fill it in ................. minutes .

If one pipe A can fill a tank in 20 minutes, then 5 pipes, each of 20% efficiency of A, can fill the tank in :

6 pipes can fill a tank in 24 minutes. One pipe can fill in

Pipe A can fill a tank in 36 minutes and pipe B can fill it in 45 minutes. If both the pipes are opened to fill an empty tank, in how many minutes will it be full?

Pipe A can fill a tank in 36 minutes and pipe B can fill it in 45 minutes. If both the pipes are opened to fill an empty tank, in how many minutes will it be full?

A pipe can fill a tank in 12 minutes. Another pipe can empty a tank in 20 minutes. They are opened in alternate minutes, How long will it take to fill the tank?

A pipe can fill a tank in 12 minutes. Another pipe can empty that tank in 30 minutes. If they are opened alternatively. How much time will they take to fill that tanke?

Pipe A can fill a tank in 20 minutes and pipe B can fill the tank in 30 minutes. Both the pipes can fill at the rate of 8 liters per second. What is the capcity of the tank (in litress) ?