The beaver the excellent swimmer and the diver he began to swim at 14:55 within 7 minutes he swam and then dived how many minutes the woman was under water if he came up 15:06 16 minutes

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+ 7 minutes 14 hours 62 minutes will turn out 14:55, but full hour already makes 60 minutes, i.e. will be 15:02 15:02 dived, and at 15:06 came up, i.e. floated under water 06-02=4 minutes the Beaver was in water 4 minutes
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