Question

270 metres long train running at the speed of 120 kmph crosses another train running in opposite direction at the speed of 80 kmph in 9 seconds. What is the length of the other train

Answer 1

Answer:

230m

Explanation:

relative motion question

trains move in opposit direction

Vab=120+80=200km/h

length of other train=x

time=9s=9/3600h=1/400hr

Vab=length of train A +B/time

200=(.270+x)/1/400

1/2=.270+x

x=.500-.270=.230km=230m