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- A train moves with a speed of 108 Km/h
- A speed of 14 meters per second is the same as?
- A train of length of 150 meters takes 40.5 seconds to cross
- A train 132 meter long passes a telegraph pole in 6 seconds
- A train 108 meter long moving at a speed of 50 km/h crosses
Explanation
“A train 150 meter long passes a km stone in 15 seconds”; through this statement, the speed of first train will be calculated
Speed of first train = 150/15 = 10 m/sec
Assuming the speed of other train “y”, relative speed becomes y + 10. Total length becomes 300 m, time is also given i.e. 8 seconds. So, speed of other train will be determined with speed distance formula.
Speed = Distance/Time
To Find
Speed of other train = ?
Solution
Let suppose the speed of other train = y
The speed of first train = 150/15 = 10 m/sec
Relative speed = 10 + y
Total length = 150 + 150 = 300 meter
Time (Given) = 8 seconds
Now,
Speed = Distance/Time
10 + y = 300/8
y = 37.5 – 10
y = 27.5 m/sec
This speed in km/h will be
y = (27.5 x 3600)/1000
y = 99 km/h answer
Conclusion
A train 150 meter long passes a km stone in 15 seconds and another train of the same length travelling in opposite direction in 8 seconds. The speed of the second train will be 99km/h.
