Distance, Speed & Time (3)( Week 48 Practice) 2. A train needs 115 seconds to cross (from entering to completely exiting the bridge) a 803-meter long bridge. At the same speed, it needs 125 seconds to cross a 913-meter long tunnel. What is the length of the train in meters? 4. Nick and his dad were riding a tandem bike in a round training trail. During the first lap, only Nick pedaled and the tandem bike traveled at 3 MPH. During the second lap, only his dad pedaled and the tandem bike traveled at 9 MPH. During the third lap, Nick and his dad both pedaled and the tandem bike traveled at 18 MPH. What was the average speed (in MPH) for the entire 3 laps? 5. The ratio of Sofia's walking speed to Curtis's walking speed was 15:11. If they walked towards each other at the same time, they would meet each other after 8 minutes. If they started out at the same time to the same direction, and Sofia was behind Curtis, how long (in minutes) would it take Sofia to catch up with Curtis? |