When will the Tank be Empty 3 Pipes Opened at different time

Two taps A and B can fill a tank in 15 hours and 12 hours respectively. The third tap C is able to empty in 4 hours. If these taps are opened at 12 noon, 1 pm and 3 pm respectively find the time at which the tank will be empty. #GCSE #SAT #EQAO #IBSLmath

[dtatcon]

You are a genius Sir. Thankyou for the explanation!!

[puranatvaofficial]

Thanks a lot sir that's what I was searching

[akshaypampatwar]

Thank u sir .
This is what i was looking for ..
Ur explaination and way to solve the question..is superb....

[sherlin_.]

Sir, what equation will be used in this problem fo me easy to solve this kind of word problem

[bobricachannel]

i beg to disaggre, at 3 PM the tap is not stop. The Tap A&B is continous to flow, therfore, we should consider also the flow of A&B while tap C is draining the volume of the tank.

[saikumarthupakula]

Sir -6 lit/3hrs no.. means per hr only 2 lit no..