Question

length of platform which a train 400 m long travelling at 45 km per hour can cross in 40 second is ......

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Answer 1

Answer:

500 m

Step-by-step explanation:

I think this is the answer

Answer 2

Answer:

Option C

100m

Step-by-step explanation:

Speed= 45km/h = 5/18×45= 25/2m/s

Time taken= 40seconds

Length of train= 400m

Distance = Speed×Time

25/2×40=500m

Length of platform= Total distance-length of train

Length of the platform=500-400

=100m

Hope It Helps You :)