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
  
  
• 9 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
• 9 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
• 9 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
• 4 years agoHelpfull: Yes(1) No(0)
• To calculate the speed of the train, we first need to determine the total distance it covers while passing the platform.
  
  ### Step 1: Calculate total distance
  The train covers the length of both the train and the platform:
  [
  text{Total Distance} = text{Length of Train} + text{Length of Platform}
  ]
  [
  text{Total Distance} = 150 , text{m} + 200 , text{m} = 350 , text{m}
  ]
  
  ### Step 2: Calculate speed in meters per second
  The time taken to cover this distance is 15 seconds. The speed of the train is:
  [
  text{Speed} = frac{text{Total Distance}}{text{Time}} = frac{350 , text{m}}{15 , text{sec}} = 23.33 , text{m/s}
  ]
  
  ### Step 3: Convert speed to km/h
  To convert meters per second to kilometers per hour, multiply by 3.6:
  [
  text{Speed in km/h} = 23.33 times 3.6 = 84 , text{km/h}
  ]
  
  ### Final Answer:
  The speed of the train is **84 km/h**, so the correct option is:
  **C) 84 km/h**.
• 3 Months agoHelpfull: Yes(0) No(0)