Question

The speed limit on a highway is 65 miles per hour. a driver wants to travel 487 miles along the highway in the next 9.8 hours. what is the longest span of rest time available to the driver to complete this journey without ever exceeding the speed limit?

Answer 1

1) 487 miles / 65 miles per hour = 7.5h at max speed
2) 9.8h - 7.5h = 2.3h rest time avaliable