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Questions and Answers
What is the ratio of the speeds of two trains starting from 2 stations 200 km apart and going in opposite direction?
What is the ratio of the speeds of two trains starting from 2 stations 200 km apart and going in opposite direction?
- 7:3
- 12:8
- 11:9 (correct)
- 18:4
What is the length of a train that can cross a pole in 10 seconds, if its speed is 20 meters per second?
What is the length of a train that can cross a pole in 10 seconds, if its speed is 20 meters per second?
- 180 M
- 200 M (correct)
- 250 M
- 150 M
If a car covers a certain distance in 10 hours at a speed of 80 km/hr, what will be the increased speed required to cover the same distance in 4 hours?
If a car covers a certain distance in 10 hours at a speed of 80 km/hr, what will be the increased speed required to cover the same distance in 4 hours?
- 40 KM/HR
- 90 KM/HR
- 60 KM/HR
- 120 KM/HR (correct)
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Study Notes
Relative Speed
- Two trains start from 2 stations 200 km apart, moving in opposite directions.
- The ratio of their speeds is unknown.
Train and Pole
- A train crosses a pole in 10 seconds.
- The speed of the train is 20 meters per second.
- The length of the train can be calculated based on this information.
Time and Speed
- A car covers a certain distance in 10 hours at a speed of 80 km/hr.
- To cover the same distance in 4 hours, the car needs an increased speed.
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