Home » Aptitude » Speed, Time and Distance » Question
  1. A train crosses a platform in 30 seconds travelling with a speed of 60 km/h. If the length of the train be 200 metres, then the length (in metres) of the platform is
    1. 400
    2. 300
    3. 200
    4. 500
Correct Option: B

Speed of train = 60 kmph

=60 ×
5
m/sec.
18

=
50
m/sec.
3

If the length of platform be = x metre, then
∴  Speed of train =
Length of (train + platform)
Time taken in crossing

⇒ 
50
=
200 + x
330

⇒  50 × 10 = 200 + x
⇒  x = 500 – 200 = 300 metre



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