Question

3. Three pipes P. P and P, can fill an empty tank in 6 hours, 8 hours and 12 hours
respectively. If the tank is filled using all the pipes at the same time, in how much time
will the tank be filled?​

Answer 1

Answer:

In 1 hr three pipes will fill 1/6, 1/8 and 1/12 part of the tank

So if all the pipes are open, then in 1 hr (1/6+1/8+1/12 =9/24=3/8) part of the tank will be filled.

So 3/8 part of the tank is filled in 1 hr

Then full part (=1) will be filled in 8/3 hr=2hr40mt