Q. A train which is 150m. long passes a platform of 200 m in 15 sec. What is the speed of the train?
A) 36 km/hr
B) 64 km/hr
C) 84 km/hr
D) 91 km/hr

• total distance cover by train in 15sec=150+200m
  speed=distance/time
  speed=350/15(m/s)
  speed in km/hr=350/15*18/5=84km/hr
  
  
• 8 years agoHelpfull: Yes(7) No(0)
• C) 84 km/hr
  
  Total distance crossed=150+200=350 m. or 0.35 km. and time taken(in hr.)=15/3600
  So speed= 0.35/(15/3600)=84 km/hr
• 8 years agoHelpfull: Yes(2) No(0)
• 200+150 m distance covered in 15 secs ,then applying simple unitary method get the speed
  answer will be 84km/hr option c
• 8 years agoHelpfull: Yes(2) No(0)
• 84km/hr
  answer in m/sec=23.3
  convert m/sec into km/hr =23.3*18/5=84km/hr
• 7 years agoHelpfull: Yes(2) No(0)
• 150+200=350
  350/15=70/3m/s
  =84km/hr
• 6 years agoHelpfull: Yes(1) No(0)
• (150m+200m)/15s=350/15
  =70/3 m/s.=(70*18)/3*5=84km/hr
  84km/h
• 3 years agoHelpfull: Yes(1) No(0)