CAT Quant · Chapter Test
Trains — 25-Question Test
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Formula Reference Sheet
This chapter
Core relations
| Crossing a point (pole/man/signal) | time = train length ÷ speed |
|---|---|
| Crossing a platform/bridge | time = (train length + platform length) ÷ speed |
| km/h to m/s | multiply by 5/18 |
| m/s to km/h | multiply by 18/5 |
| Speed | speed = distance ÷ time |
Two bodies in motion
| Relative speed — opposite directions | add the two speeds |
|---|---|
| Relative speed — same direction | subtract (faster − slower) |
| Two trains crossing each other | time = (L₁ + L₂) ÷ relative speed |
| Train crossing a moving man/train | distance = sum of relevant lengths, speed = relative |
| Two crossing times → lengths | use point-time × speed = own length |
CAT reference
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