Objects Crossing and Time Allocation
Objects Crossing and Time Allocation
#### If a car travels 60 mph and another car travels 80 mph, how long will it take for the slower car to be 120 miles behind the faster car, if they both start at the same time and travel in the same direction?
1. [ ] 5 hours
2. [ ] 2 hours
3. [x] 6 hours
4. [ ] 5 hours
#### A group of 12 students need to cross a bridge that can only accommodate 2 students at a time. If it takes 1 minute for 2 students to cross, how long will it take for all 12 students to cross the bridge?
1. [x] 6 minutes
2. [ ] 12 minutes
3. [ ] 21 minutes
4. [ ] 22 minutes
#### A car travels from one city to another city that is 160 miles away. The car starts at 10:00 AM and travels for 2 hours, then stops for 1 hour for lunch, and then continues traveling for 2 more hours. What time did the car reach the second city?
1. [ ] 2:00 PM
2. [x] 3:00 PM
3. [ ] 4:00 PM
4. [ ] 5:00 PM
#### A takes 2 hours 30 minutes more than B to walk 40 km. If A doubles his speed, then he can make it in 1 hour less than B. How much time (in hours) does A require for walking a 40 km distance?
1. [ ]6
2. [x]8
3. [ ]9
4. [ ]5
#### 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
