Maths Two taps A and B can fill a tank in 6 minutes and 7 minutes respectively, starting from A, each tap is opened alternately for one minute. How much time will it take to fill the tank?
| Q.201521: Two taps A and B can fill a tank in 6 minutes and 7 minutes respectively, starting from A, each tap is opened alternately for one minute. How much time will it take to fill the tank? |
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