Home » Aptitude » Speed, Time and Distance » Question
  1. A train passes a platform 110 m long in 40 seconds and a boy standing on the platform in 30 seconds . The length of the train is
    1. 100 m
    2. 110 m
    3. 220 m
    4. 330 m
Correct Option: D

Let the length of the train be x metres.

Speed of train in crossing boy =
x
30

Speed of train in crossing platform =
x + 110
40

According to the question,
x + 110
=
x
4030

⇒ 
x + 110
=
x
43

⇒  4x = 3x + 330
⇒  x = 330 metres



Your comments will be displayed only after manual approval.