It is 21/60. You can simplify that to 7/20 but the simplified version is often less easy to work with.
21/60
It is 21/60 or 7/20 of an hour in its simplest form
It is 7/20 of an hour, just over a third. (21/60 = 7/20)
1 hour = 60 minutes so 21 hours = 60*21 =1260 minutes
21 miles / 21 minutes, x 60 (mins per hour) is 60 miles per hour
mph means Miles Per Hour, so 21 miles takes 21/60=.35 hour. Then .35 hour is equal to .35*60=21 minutes. So the final answer is 21 minutes
1 hour and 21 minutes.
If you have to cover 21 miles in 21 minutes, then you need to cover 1 mile every minute. There are 60 minutes in an hour, so if you kept that up for an hour, you'd cover 60 miles.
It is: 0.35*60 = 21 minutes
1 hour = 60 minutes0.35 hour = (0.35 x 60) = 21 minutes
1 hour = 60 minutes⇒ 0.35 hour = 0.35 x 60 minutes= 21 minutes21 minutes
2 thirds or 4 sixths