What are you looking for? Let’s dig in quickly
Recommended
- A train is moving at a speed of 132 km/h
- A train 240 meter long passed a pole in 24 seconds
- A train 360 meter long is running at a speed of 45 km/h
- A train 280 meter long, running with a speed of 63 km/h
- A train 100 meter long is running at the speed of 30 km/h
- Two trains of equal lengths take 10 seconds and 15 seconds
- How long does a train 110 metres long running at the speed
- Two trains 140 and 160 meter long runs at a speed of 60km/h
- In what time will a train 100 meters long cross an electric pole
- How many seconds will a 500 meter long train take to cross a man
Explanation
A jogger running at 9km/h in the direction of train so relative speed will be determined by subtracting 9 from 45 km/h.
Jogger is 240 meter ahead so
Total distance = 240 + length of the train = 240 + 120 = 360
Time = Distance/Speed
To Find
Time = ?
Solution
Relative speed = 45 km/h – 9 km/h
Relative speed = 36 km/h
Now, to change it into m/sec;
Relative speed = (36 x 1000)/3600
Relative speed = 10 m/sec
Total distance = 240 + 120 = 360 m
Now,
Speed = Distance/Time
Time = Distance/Speed
Time = 360/10
Time = 30 seconds answer
Conclusion
A jogger running at 9km/h alongside a railway track is 240 meter ahead of the engine of a 120 meter long train running at 45km/h in the same direction. In 30 seconds train will pass the jogger.
