Question

Two trains are running in opposite directions with the same speed. If the length of each train is 100 meters and they cross each other in 10 seconds, then the speed of each train is (in km/hour)
1. 84
2. 72
3. 36
4. 32

Answer 1

Correct Answer - Option 3 : 36

Given:

If the length of each train is 100 meters and they cross each other in 10 seconds.

Formula used:

Speed = Distance/Time

Calculation:

According to the question,

Two trains are running in opposite direction

Total distance = 100 + 100 = 200 m

Time = 10 sec

Total speed = S + S = 2S

⇒ 2S = 200/10

⇒ S = 10 m/sec

Convert m/sec to km/hr

⇒ 10 × (18/5)

⇒ 36 km/hr

∴ The speed of each train is (in km/hour) 36.