You could do it the hard way. 3 miles per hour means that every hour you go 3 miles. So the first hour you go three miles leaving you 286 - 3 = 283 to go. Then the second hour you go another 3 miles leaving you 280 miles to go, and so on.
Or you can do it the easy way if you remember the method for subtracting the same amount over and over again. You will have a fractional answer, but remember that 1/3 hour is 20 minutes.
John
My calculator said it, I believe it, that settles it
