9 hours and 36 minutes.
Explanation:
0.4 days = 9.6 hours;
9.6 hours = 9 hours + 0.6 hours
0.6 hours = 36 minutes. Therefore:
0.4 days = 9 hours + 0.6 hours
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀ = 9 hours + 36 minutes Read more