Question

A moving train crosses a man standing on a platform and the platform 300m long in 10sec and 25 sec respectvely.what will be the time taken by the train to cross a platform 200m long.

Answer 1

7 sec are taken by train

Answer 2

Answer:

20 seconds.

Step-by-step explanation:

 

Train crosses the platform whose length is 300 metres in25−10=15 seconds, here train's length is not added.

 

So speed of the train =300/15 = 20 m/sec  

length of the train = 10×20 = 200 metres

Time taken by the train to cross a platform 200 metre long  

 

=length of train + platform / speed

 

=(200+200)20=400/20

Time taken by train = 20 seconds.