### Online Exam » Aptitude » Problems On Train

**Problems On Train :**

3. Time taken by a train of length l metres to pass a pole or a standing man or a signal post is

equal to the time taken by the train to cover l metres

4. Time taken by a train of length l metres to pass a stationary object of length b metres is the

time taken by the train to cover (l + b) metres

5. Suppose two trains or two bodies are moving in the same direction at u m / s and v m /s,

where u > v, then their relatives speed = (u - v) m / s.

6. Suppose two trains or two bodies are moving in opposite directions at u m / s and v m / s, then

their relative speed is = (u + v) m /s

7. If two trains of length a metres and b metres are moving in opposite directions at u m / s and

8. If two trains of length a metres and b metres are moving in the same direction at u m / s and

9. If two trains (or bodies) start at the same time from points A and B towards each other and

after crossing they take a and b sec in reaching B and A respectively, then