Question

A train running at a speed of 45 km/h is 400m long . How long will it take to pass a vendor standing on station platform​

Answer 1

Answer:

• speed of the train=v=45km/h=12.5m/s
• length of the train=s= 400m

Step-by-step explanation:

1. by using formula of speed
2. v=s/t
3. t=s/v
4. t= 400/12.5
5. t=32s

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Answer 2

To pass a vendor standing on the platform the train must travel 400m.

45km=45000m/3600 sec=12.5m/sec

the train travels 12.5 m in 1 sec

∴, the train travels 400m in =1/12.5×400= 32 sec.