raselhossaintro raselhossaintro

15-10-2022
Mathematics

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Two taps, T1 and T2 can fill an empty tank in 20 minutes and 15 minutes, respectively. They both were turned on to fill the tank, but tap T1 was turned off after some time, and tap T2 took 10 minutes to fill the tank. Find out after how much time tap T1 was turned off?

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