Question

A 315 m long train takes 7 seconds to cross a man who is running at 6 km per hour in the same direction in which the train is going what is the speed of the train in kilometre per hour

Answer 1

Let the speed of the train be x km/h Also,Speed =distance/time
same direction so train speed- man speed

(x-6)*5/18=315/7
x-6=18*9
x=162+6=168 m/s