Question

Two train length is equal to 200 and 250 respectively are running is opposite direction or parallel tracks if there 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...