Two trains are running in opposite directions at the same speed. The length of each train is 180 m. If they cross each other in 12 seconds, what is the speed of each train (in km/h)?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e 54.
Distance covered while crossing = 180 + 180 = 360 m
Time = 12 s
Relative speed = 360 ÷ 12 = 30 m/s
Each train’s speed = 30 ÷ 2 = 15 m/s
Convert to km/h = 15 × 18 ÷ 5 = 54 km/h