The answer will depend on whether it is for low quality audio or hi definition video (or something intermediate). Since you have not bothered to share that crucial bit of information, I cannot provide a more useful answer.
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a couple of minutes x
4 hours 10 minutes = 250 minutes, and 1 hour 35 minutes = 95 minutes 250 minutes - 95 minutes = 155 minutes = 2 hours 35 minutes
172 minutes is 2 hours and 52 minutes
There are 133 minutes
45 minutes/1 day = 45 minutes/24 hours = 45 minutes/(24*60 minutes) = 45 minutes/1440 minutes = 0.03125