A tap can fill the tank in 15 minutes and another can empty it in 8 minutes. If the tank is already half-full and both the taps are opened together, how many minutes will the tank take to be emptied

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সঠিক উত্তর: 8। ব্যাখ্যা:

A tap can fill the tank in 15 minutes and another can empty it in 8 minutes. If the tank is already half-full and both the taps are opened together, how many minutes will the tank take to be emptied

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