Question

two trains starting at the same time from two stations, new york and new Jersey which are 200km apart.both the trains are going in opposite direction to each other and cross each other at a distance of 110km from the station new york.what is the ratio of their speed

Answer 1

speed of new york train = 200-110=90 km/hr
speed of new Jersey train = 200-(200-110)=200-90=110 km/hr
ratio=a:b
       =90:110
       =90/110
       =9:11