Depends on your speed. If you convert hours to minutes, then you could say 40 MPH (miles per hour), it just all depends on your speed.
40 minutes
40 miles = 60 minutes 4 miles = 6 minutes 12 miles = 6 x 3 minutes = 18
Eight minutes.
40 minutes
40 minutes.
40 minutes
30 minutes.
10.5 minutes.
It will take 1 hour and 30 minutes to drive 60 miles at 40 mph. You can go 40 miles in 1 hour, therefore you will go 20 miles in half an hour. 40 + 20 = 60 miles.
It takes 1 hour 40 minutes.
60 miles at 40 mph will take 1 hour 30 minutes.
It takes 15 minutes to go 10 miles at 40 miles per hour.