Mathematics, 04.02.2020 18:50 genyjoannerubiera

Tap a takes 6 min to fill a tank and tap b takes 9 min to fill the same tank. pipe c can empty the tank in 15 min. 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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Tap a takes 6 min to fill a tank and tap b takes 9 min to fill the same tank. pipe c can empty the t...