A train 125 m long passes a man, running at 5 km/hr in the same direction in which the train is going, in 10 seconds. The speed of the train is:

A. 45 km/hr
B. 50 km/hr
C. 54 km/hr
D. 55 km/hr

• speed of train relative to man= 125/10 m/sec
  convert into km/hr= 125/10 * 18/5
  = 45 km/hr
  Let speed of train be x km/hr then relative speed is (x-5)= 45
  x= 50 Ans
• 11 years agoHelpfull: Yes(6) No(0)
• Speed of the train relative to man = 125 m/sec
  10
  = 25 m/sec.
  2
  = 25 x 18 km/hr
  2 5
  = 45 km/hr.
  
  Let the speed of the train be x km/hr. Then, relative speed = (x - 5) km/hr.
  
  x - 5 = 45 x = 50 km/hr.
• 8 years agoHelpfull: Yes(0) No(0)