1 ) A truck and van left from Portland in opposite directions. The truck traveled for S hours at74 mph. The vehicles were 608 miles apart. Find the van's average speed. 2 ) A train left for Burbank, and 6 hours rater, a car traveling 87 mph tried catching up to the train. After 4 hours, the car caught up. what was the train's average speed?

3 ) Tim left Greensboro with a speed of 77 mph. Mary also left at the same time in the opposite direction at a speed of 76 mph. Find how many hours Mary must travel before they are 247 miles apart.

4 ) A plane set off to Burbank at a speed of 28g mph. On the return flight of 15 hours, the plane cruised at 29b mph. How many hours long was the flight to Burbank?

5 ) Nancy left downtown Durham, and three hours later, Tom left going 54 mph faster to catch up. After another two hours, Tom caught up. Find Nancy's average speed.

6 ) Tom left the city for vacation. Sally left 8 hours later going 79 mph faster to catch up. After 7 hours sally caught up. what was Tom's average speed?

7 ) Melanie traveled to Greensboro by car. Going there took t hours, and the return trip lasted 6 hours. Melanie averaged a speed of 86 mph while returning. Find the average speed of the trip there.

8 ) A cargo plane flew from the US across the Ailantic at 281 mph, and flew bac* to the US at 301 mph. Given that the first trip took two hours longer, how long was the return trip?

9 ) Tim left the city traveling at 85 mph, while, at the same time, Joan left the city going the opposite direction at a speed of g0 mph. Find the time Tim traveled before the two were 185 miles apart.

10 ) Joan left Tampa traveling 54 mph. Dan, to catch up, left some time later driving at 63 mph. Dan caught up after 7 hours. How long was Joan driving before Dan caught up?