Question

two trains of length 200 m and 250 m respectively are running in opposite direction on parallel tracks. if their speed be 45 km per hour and 50 km per hour respectively, in what time will they cross each other?​

Answer 1

Length of 1st train=200m
Speed of 1st train=45 km/h
=45×5/18=12.5 m/s
Length of 2nd train=250 m
Speed of 2nd train=50km/h=13.88 m/s=14 m/s

Here question Saying time taken to pass Both trains.Means train has now meet and We have to find after how many seconds both Train will be on passing each.
Then total Length=200+250=450 m
Total speed=12.5+14=26.5 m/s
Time=Length/speed
Time=450/26.5
Time=13.98 second

Almost=14 seconds

$\boxed{\mathbf{Time=14\: seconds}}$

Answer 2

Answer:

Step-by-step explanation:

But 450 divided by 26.5 is equal to 16.98, I. e. approximately 17