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A tank is fitted with two taps A and B. ...

A tank is fitted with two taps A and B. A can fill the tank completely in 45 minutes and B can empty the full tank in 1 hour. If both the taps are opened alternatively for 1 minute, then in how much time the empty tank will be filled completely ? (a) 2 hrs 55 mirn (d) 5 hrs 53 min (b) 3 hrs 40 min (e) None of these (c) 4 hrs 48 min

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