A) \[10\frac{4}{9}\]
B) \[9\frac{1}{9}\]
C) \[8\frac{8}{9}\]
D) \[7\frac{2}{9}\]
E) \[9\frac{5}{9}\]
Correct Answer: C
Solution :
When all three pipes are opened simultaneously, part of the tank filled in 1 hour \[=\frac{1}{12}+\frac{1}{16}-\frac{1}{30}\] \[=\frac{20+15-8}{240}=\frac{27}{240}\] \[\therefore \] Required time \[=\frac{240}{27}\] \[=\frac{80}{9}=8\frac{8}{9}\] hoursYou need to login to perform this action.
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