Two trains are running in opposite directions with the same speed. If the length of each train is 120 meters and they cross each other in 12 seconds, then the speed of each train (in km/hr) is?
A. 10 km/hr
B. 18 km/hr
C. 72 km/hr
D. 36 km/hr
Answer: Option D
Solution(By Examveda Team)
Let the speed of each train be x m/sec.Then, relative speed of the two trains = 2x m/sec
So, 2x = $$\frac{{120 + 120}}{{12}}$$
⇒ 2x = 20
⇒ x = 10
∴ Speed of each train = 10 m/sec
= $$\left( {10 \times \frac{{18}}{5}} \right)$$ km/hr
= 36 km/hr
Related Questions on Problems on Trains
A. 120 metres
B. 180 metres
C. 324 metres
D. 150 metres
A. 45 km/hr
B. 50 km/hr
C. 54 km/hr
D. 55 km/hr
A. 200 m
B. 225 m
C. 245 m
D. 250 m
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