Your driving on a highway and are about 215 miles from a state border. You set cruise control at 60 mph and plan to turn it off within 35 miler of the border on either side. Question in Description

Question

Find the minimum and maximum number of hours you plan to have cruise control on?

Answer 1

Well, if you are 215 miles from the border and you turn it off 35 miles before you get to the border, the distance to the "turn-off" location is 215 - 35 = 180 miles. Since you are going to be traveling at 60 mi/hr, 180/60 = 3 hours

If you turn it off 35 miles past the border, then the distance to the "turn-off" location is 215 + 35 = 250 miles. The time to that location is 250/60 = 4 1/6 hours or 4 hours 10 minutes.

So you'll have the cruise control on for between 3 hours (minimum) and 4 hours, 10 minutes (maximum)