Question

two trains 110 M and 100 M long are running on parallel tracks in same direction at the speed of 46 km per hour and 36 km per hour respectively.How long will it take them to cross each other

Answer 1

speed of train I. e 100m=10m/s

speed of train I. e110m=12.5 m/s

total distance =210m

relative velocity =2.5m/s

210/2.5

84s