A family is taking a cross country trip by car. They drive at an average speed of 55mi/h, and their goal is to travel at least 400 mi/day. How many hours per day do they need to drive?

Answer 1

400/55 = 7.27 hours per day

d=rt

distance = rate of speed times time

400 = 55t

t = 400/55 = about 7.27 hours per day, = 7 hours & 16 minutes & 22 seconds per day