G7: Speed, Distance and Time

Two planes leave an airport and fly in opposite directions. One plane flies at 150 miles/hour and the other plane flies at 120 miles per hour. How many hours will it take for the two planes to be 810 miles apart?

(a)  

Two people leave from two towns that are 300 miles apart and travel toward each other along the same road. Person A drives 20 miles/hour (mph) slower than person B. If they meet in 3 hours, at what speed did person B travel?

(a)  

An aircraft carrier made a trip to Guam and back. The trip there took three hours and the trip back took four hours. It averaged 6 km/h on the return trip. Find the average speed of the trip there.

(a)  

A cattle train left Miami and traveled toward New York. 14 hours later a diesel train left traveling at 45 km/h in an effort to catch up to the cattle train. After traveling for four hours the diesel train finally caught up. What was the cattle train's average speed?

(a)  

A cargo plane flew to the maintenance facility and back. It took one hour less time to get there than it did to get back. The average speed on the trip there was 220 mph. The average speed on the way back was 200 mph. How many hours did the trip there take?

(a)  

Two people walk from the same place in opposite directions. If they leave at the same time and person A walks 1.5 times as fast as person B, and in 3 hours, they are 22.5 miles apart, what is the walking speed of person B?

(a)