Question

A train of length 140 m travels with a speed of 72 kilometre per hour. The time taken by the train to pass a telephone post is
options :
a) 9 minutes
b) 9 seconds
c) 7 seconds
d) 7 minutes
​

Answer 1

Answer:

c) 7 seconds

Step-by-step explanation:

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The length of, the train = 140 mts.

Speed = 72 kmph

= 72×5 / 18=20 mts./sec

The train will pass the telegraphic Post in 14020 = 7 seconds