Pipe A can fill a tank in 5 hours. Pipe B can empty it in 12 hours. If both pipes are opened together, how much time will it take to fill the tank?

Pipe A can fill a tank in 5 hours. Pipe B can empty it in 12 hours. If both pipes are opened together, how much time will it take to fill the tank?
पाइप A एक टैंक को 5 घंटे में भर सकता है। पाइप B इसे 12 घंटे में खाली कर सकता हैं। यदि दोंनो पाइप एक साथ खोले जाते हैं, तो टैंक को भरने में कितना समय लगेगा?

\(8\frac{2}{7}\) hours/\(8\frac{2}{7}\)घंटे \(8\frac{3}{7}\) hours/\(8\frac{3}{7}\) घंटे \(8\frac{1}{7}\) hours/\(8\frac{1}{7}\) घंटे \(8\frac{4}{7}\) hours/\(8\frac{4}{7}\)घंटे

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