Speeds with Time Differences

Speeds with Time Differences

#### If a car is traveling at a speed of 60 mph and has a head start of 2 hours on another car traveling at a speed of 80 mph, how far apart will they be after an additional 3 hours? 1. [ ] 15 miles 2. [ ] 45 miles 3. [ ] 75 miles 4. [x] 60 miles #### If a car travels at a speed of 75 mph for 4 hours, and then stops for 1 hour, what is its average speed for the entire trip? 1. [ ] 60 mph 2. [ ] 72 mph 3. [ ] 75 mph 4. [x] 25 mph #### A car travels 20 miles in 20 minutes. What is its average speed in mph? (1 hour = 60 minutes) 1. [ ] 30 mph 2. [ ] 36 mph 3. [ ] 40 mph 4. [x] 60 mph #### Two train of the same length are running on parallel tracks in the same direction at 44 km/h and 32 km/h. The faster train passes the other train in 72 seconds. What is the length (in m) of each train? 1. [ ] 100 2. [x] 120 3. [ ] 135 4. [ ] 75 #### The speed of a boat in still water is 10 km/h. The speed of the stream is 2 km/h. What is the total distance that the boat will travel if it is rowed for 4 hours upstream and 3 hours downstream. 1. [ ]70 km 2. [ ]72 km 3. [ ]64 km 4. [x]68 km