Question

A train 120m long is running at a speed of 10 m/sec.The time taken by it to pass a man standing near the railway line is ....​

Answer 1

Step-by-step explanation:

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the distance between man and train is not given ??

so,approx 5 minutes is time...

Answer 2

Step-by-step explanation:

length=120m

speed=10m/s

The relative velocity of train with respect to bird is =(10+5)m/s

=15m/s

Since they are opposite to each other then addition will be occurred.

Hence, in aframe of Reference in which bird is at rest the train is moving with velocity =5m/s

The train is 120m long hence time taken for time to pass (from where bird is) end to end is

Speed=

time

distance

time=

15

120

=8sec