A pipe can fill a tank in 9 hours. Another pipe can empty the filled tank in 63 hours. If both the pipes are opened simultaneously, then the time (in hours) in which the tank will be two-third filled, is:
A28
B21
C14
D7
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Related Questions:
A and B together can do a certain work in x days. Working alone, A and B can do the same work in (x + 8) and (x + 18) days, respectively. A and B together will complete 5/6 of the same work in:
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ഒരാൾ 12 ദിവസം കൊണ്ട് ചെയ്ത് തീർക്കുന്ന ജോലി നാല് ആളുകൾ എത്ര ദിവസം കൊണ്ട് ചെയ്തുതീർക്കും?
Abhinav, Bikash and Chetan can complete a piece of work in 16 days, 24 days and 32 days respectively. If Bikash leaves 2 days before completion of the work, then find the total days required to complete the work.
E and F can do a work in 10 days. If E alone can do it in 30 days, F alone can do it in ____ days.