Question

two trains of length 300 metre and 250 metre are moving. each train has a speed of 85 km/h and moving in opposite direction. how long will it take them to pass each other

Answer 1

Total distance needs to be covered for crossing is 300+250m =550m
The resultant speed will be 170km/h as trains are moving in opposite directions
170*5/18=47.22m/s
time=distance/speed
time=550/47.22
time=11.64sec

Answer 2

time =distance /time

time =550/47.22

time =11.64sec