There are 12 quarter hours in 3 hours, since there are 4 quarter hours in an hour.
285 seconds.
There are 4800 seconds in 2/3 of 2 hours
45
11,400 seconds.
There are 12 quarter hours in 3 hours, since there are 4 quarter hours in an hour.
18
285 seconds.
There are 788400 seconds in 3 hours and 39 minutes.
3 hours 5 minutes 30 seconds is 11,130 seconds.
There are 11,400 seconds in 3 hours and 10 minutes.
180.25 minutes in 3 hours 15 seconds.
3 hours 35 minutes is 12,900 seconds.
There are 4800 seconds in 2/3 of 2 hours
3,600 seconds = 1 hour600,000 seconds = 1662/3 hours
12600 seconds = 3 hours 30 minutes.
45