Question

14. Two pipes can fill a tank in 8 hours and 12
hours respectively. While a third pipe can
emptied the tank in 6 hours. If all the three
pipes are opened at 1 p.m., 2 p.m., 3 p.m.
respectively then the tank will be full in-
(1) 6 a.m. (2) 7 a.m.
(3) 8 a.m. (4) 7:30 a.m.




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Answer 1

7 a.m tank will be fulled

Answer 2

By 7am the tank would be full