1.075
2.5 km per hour
3
You would need to swim at a speed of 1.5 km/h in order to cross a 3 km channel in 2 hours.
In 12 hours, the min hand will just about cross 12 times.
The minute hand will cross over the hour hand once every hour. So in 12 hours, the answer is 12 times.
1 (hour) 1 (hour) 1 (hour) 1 (hour) +__________ = 4 (hours)
In one hour there is one hour or 60 minutes. In one day there are 24 hours.
3.4 of an hour is 3.4 hours, or 3 and 4/10 hours, or 3 hours and 24 minutes.
One half hour.
.25 hours is a quarter of an hour.
Four quarter hours.
31/2 hours.