We want to convert 1.5 days to seconds.
Let us look at the convertion of days down to seconds step by step
1 day = 24 hours
1 hour = 60 minutes
1 minute = 60 seconds
Therefore, conversion of days to seconds is
1 day = 24 x 60 x 60 seconds
1 day = 86,400 seconds
Therefore, 1.5 days to seconds = 1.5 x 86,400
= 129,600 seconds
The correct option is Option C