1.

Two pipes A and B can fill a tank in 30 hours and 35 hours, respectively. If both the pipes are opened simultaneously, how much time will it take to fill the tank?

A. \(16\frac{7}{13}\)
B. \(16\frac{5}{13}\)
C. \(16\frac{12}{13}\)
D. \(16\frac{2}{13}\)
Answer» E.


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