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1. |
Two pipes A and B can fill a tank in 16 hours and 20 hours respectively. If both the pipes are opened simultaneously, how much time will be taken to fill the tank? |
A. | \[8\frac{8}{5}\]hours |
B. | \[8\frac{8}{9}\] hours |
C. | \[8\frac{17}{9}\]hours |
D. | \[8\frac{7}{9}\]hours |
Answer» C. \[8\frac{17}{9}\]hours | |