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Tap ‘A’ can fill the tank completely in 6 hrs while tap ‘B’ can empty it by 12 hrs. By mistake, the person forgot to close the tap ‘B’, As a result, both the taps, remained open. After 4 hrs, the person realized the mistake and immediately closed the tap ‘B’. In how much time now onwards, would the tank be full?

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Tap ‘A’ can fill the tank completely in 6 hrs while tap ‘B’ can empty it by 12 hrs. By mistake, the person forgot to close the tap ‘B’, As a result, both the taps, remained open. After 4 hrs, the person realized the mistake and immediately closed the tap ‘B’. In how much time now onwards, would the tank be full?






 
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