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?

1
\(16\frac{7}{13}\)
2
\(16\frac{5}{13}\)
3
\(16\frac{12}{13}\)
4
\(16\frac{2}{13}\)

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