How will you write 3.78 hours in hours, minutes and seconds?

Time = 3.78 hours

​Formula Used:

1 hour = 60 minutes
1 minute = 60 seconds

Solution:
3.78 hours means
3 hours +0.78 hours
3 hours +0.78×60 minutes
3 hours +0.78×60 minutes
3 hours +46.8 minutes
3 hours  + 46 minutes + 0.8 × 60 seconds =3 hours, 46 minutes, 48 seconds