Two trains running in opposite directions on parallel tracks at speeds of 42 km h and 57 km h take 1...........

Quantitative Aptitude (CPO) Time & distance

Two trains running in opposite directions on parallel tracks, at speeds of 42 km/h and 57 km/h, take 18 seconds to cross each other.

If the length of one train is 270 m,then the length of the other train is:

This questions was previously asked in

SSC CPO 9th Dec 2019 Shift-2

242 m

225 m

250 m

230 m

- Two trains are moving in opposite directions on parallel tracks.

- Their speeds are 42 km/h and 57 km/h.

- They take 18 seconds to completely cross each other.

- Convert speeds into meters per second:

- 42 km/h = 11.67 m/s

- 57 km/h = 15.83 m/s

- Total relative speed = 11.67 m/s + 15.83 m/s = 27.5 m/s.

- Total distance covered when they cross each other = 27.5 m/s × 18 s = 495 m.

- Given, the length of one train is 270 m.

- Let the length of the other train be L meters.

- Therefore, 270 + L = 495 m ? L = 495 - 270 ? L = 225 m.

Correct Answer: Option 2, 225 m

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