Tap A takes 6 minutes to fill a tank and tap B takes 9 minutes to fill the same tank. Pipe C can empty the tank in 15 minutes. How long will it take to fill up
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Pertanyaan
Tap A takes 6 minutes to fill a tank and tap B takes 9 minutes to fill the same tank. Pipe C can empty the tank in 15 minutes. How long will it take to fill up the tank if the pipe is in use when both taps are turned on?
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