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  1. A train is running at a speed of 90 km/hr. If it crosses a signal in 10 sec., the length of the train (in metres) is
    1. 150
    2. 324
    3. 900
    4. 250
Correct Option: D

Speed of train = 90 kmph

=
90 × 5
metre/second
18

= 25 metre/second
If the length of the train be x then,
Speed of train =
Length of train
Time taken in crossing the signal

⇒  25 =
x
10

⇒  x = 250 metre



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