Distance, Speed & Time (2)( Week 43 Practice) 1. In a train station, there are two tracks (A and B) going to a city. The earliest trains on both tracks leave for the city at 5:15 AM. After that the trains on track A leave for the city every 8 minutes and the trains on track B leave for the city every 19 minutes. If George arrives at the station at 9:15 AM, how many minutes will he have to wait for the next train? 2. David biked from his home to his high school at 7 miles per hour. When he returned home from school, using the same route, he biked at 3 miles per hour. If the total round trip took 30 minutes, what was the distance from his home to his school (in miles)? 4. The distance between place A and place B is 160 miles. Helen started to drive from place A to place B at 08:00 AM. The speed during the first half of the trip was 35 mph. The speed during the second half of the trip was 45 mph. How long (in hours) did it take Helen to get to place B from place A? 5. Two trains are driving toward each other. The faster one is driving at the speed of 24 meters per second. Its length is 160 meters. The slower one is driving at the speed of 16 meters per second. Its length is 360 meters. How many seconds will it take from the time they meet to the time they separate completely? |