Question
Riordan slept at 09 37 on Wednesday night and woke up at 19 21 the next day. How long did he sleep? Give your answer in this format.  (Eg 1 h 20 min)
2 m

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Riordan slept at 09 37 on Wednesday night and woke up at 19 21 the next day. How long did he sleep? Give your answer in this format.  (Eg 1 h 20 min)