Question

a train 300 long passed a man walking along the same direction at the rate of 3 km/hr in seconds. the speed of the train

Answer 1

Let the speed of the train be x km per hour.
Man is walking in same direction, so,
Relative speed becomes = (x-3) km/h.
In 33 secs train travels its own distance i.e. 300m.
Speed of train = 300*18/33*5 km/hour;
Or, x-3 = 32.72 km/h;
Or, x = (32.72)+3
Or, x= 35.72 km/h