Question

a tank can be filled by a tap in 5 hours and emptied by an outlet paipe in 8 hours how long will it take to fill the tank if both the tap and pipe are opened together ​

Answer 1

Answer:

10 hours.

I hope it will help you

Answer 2

Step-by-step explanation:

if 1 tap can fill the tank in 5 hours ,in 1 hours it can fill=1/5

if the another tap can empty the tank in 8 hours, in 1 hours it can empty =1/8

if they opened together =a-b

1/5-1/8=by cross multiply

1*8-1*5/8*5 = 8-5/40 = 3/40=10

therefore if both taps are open so they can fill the tank in 10 hours