A train 300 m long passed a man walking along the line in the same direction at the rate of 3km/hr in 33second. The speed of train

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 seconds train travels its own distance i.e. 300m.
Speed of train = 300*18/33*5 km/hour;
=> x-3 = 32.72 km/h;
=> x = (32.72)+3
=> x= 35.72 km/h.