On the same day it is 12 hours
I sleep about 7 to 9 hours a day
7 hours a day
24 : 7
7 hours per day x 11.2 days = 78.4 hours
365 day x 7 years x 24 hour per day = 61,320 hours
About 7 hours a day.
7 hours
24 = Day 148 = Day 21 day & 7 hours
7-9 hours is the good range.
astranauts sleep about 4 to 7 hours
24/7