Mr. Paulson has been on a train for 4 hours and traveled 320 miles. At this rate, how far will he have traveled in 5 hours?

Mr. Paulson at the time of 5 hours he would have gone 400 miles

First you need to figure out how many miles he traveled in one hour. you divide 320 by 4 which is 80. then you multiply 80 times 5 which equals 400. Mr. Paulson traveled 400 miles in 5 hours.