60 seconds = 1 minute
120 seconds = 2 minutes
129 seconds = (120 + 9) seconds = 2minutes 9seconds
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There are 2 hours and 9 minutes in 129 minutes. This can also be written as 2.15 hours.
There are 86,400 seconds in a day (24 hours x 60 minutes x 60 seconds). Therefore, in a day and a half (36 hours), there would be 129,600 seconds (36 hours x 60 minutes x 60 seconds).
There are: 2 hours and 9 minutes
6 minutes, 11 seconds
3 minutes and 32 seconds