3
2.5 km per hour
2.5 hours is equal to 25 tenths of an hour.
There is 30 minutes in a half hour. There is no hours in half hours.
At 60 miles per hour, six hours. At 30 miles per hour, twelve hours.
One.
1.075
2.5 km per hour
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.