Eight hours exactly !
180
540 minutes.
180 min.
1440
90
240000 minutes
2 and 5/60 hours, i.e. 2 and 1/12 or 2.083333 hours
That is eight hours.
1 hour and 7 minuets
There are 16,523 hours and 26 minuets in one Mars year.
48 minutes is 4/15 of 3 hours. 48 minuets sounds like Johann Sebastian's manic week following a 5-day binge.