A tank is emptied by 2 pipes and filled by a third. If the 1st two can empty the tank in 2 and 3 hrs, respectively and third can fill it in 4 hours, how much time will it take to empty the tank (45)th fully, when all three are open?
Open in App
Solution
Let the time taken to completely empty the tank is x hrs.
⇒1x=12+13+(−14) ⇒1x=712
⇒x=127hrs Complete tank will be emptied in 127 hrs ∴(45)th tank will be emptied in = 127×45=4835 hrs