2 hours after a freight train leaves Delhi, a passenger train leaves the same station travelling in the same direction at an average speed of 16 km/hr. After travelling 4 hrs the passenger train overtakes the freight train.What was the average speed of the freight train ?

• Freight train travel at the speed = 10.67 km/hr
  
  Speed of the passenger train = 16 km/hr
  Let the speed of the freight train = X km/hr
  
  Passenger train Overtakes Freight train after 4hrs means,
  
  At the time Freight train travel 6hrs. (i.e, 2hr+4hr = 6hrs)
  
  Distance traveled by freight train in 6hrs = Distance traveled by passenger train in 4hrs
  
  X *6hrs=16 *4hrs
  6X = 64
  
  X = 10.67 km/hr
• 12 years agoHelpfull: Yes(43) No(3)
• for paassngr train :
  S=D/T
  D=S*T=16*4=64
  PASSAGER TRAIN OVERTAKES FR.TRAIN AFTER 4 HOURS AND IT LEAVES THE PLATFORM AFTER 2 HOURS OF FR. TRAIN = 6 HOUS
  
  NOW Avg speed of fr. tarin =s=d/t=64/6=10.67
  
• 12 years agoHelpfull: Yes(15) No(3)
• If x kmph is speed of freight train
  4*(16-x) = 2x
  6x= 64
  x= 64/6 = 32/3 kmph
  
  check
  distance travelled by freight train in 6 hr = distance travelled by passenger train in 4 hrs
• 12 years agoHelpfull: Yes(8) No(4)
• The average speed of freight train is 10.66
  Passenger train travel in 4 hour = 16*4 = 64
  Freight train travel in 6 hour = 10.66*6 = 63.96
  
• 12 years agoHelpfull: Yes(6) No(12)
• total time taken by passenger train is 4 hours with 16 km/hr to cross the freight train which is 4 * 16 = 64 kms ...
  
  the same distance the frieght train covers in 2 + 4 hours because it has started 2 hrs early ..which is 6 hrs in total now speed can be calculated by 64/16 = 10.67..
• 12 years agoHelpfull: Yes(5) No(1)
• correct ans is 40 but i donno how if any one know pls say
• 7 years agoHelpfull: Yes(2) No(0)
• Let the Distance Covered by Freight train = Passenger Train = D kms
  
  Speed of Passenger Train = 60 km/hr
  
  Time taken by Passenger Train to Travel distance D = 4 Hrs
  
  Time taken by Freight Train to Travel Distance D = ( 4 + 2 ) = 6 Hrs
  
  Distance = Speed × Time
  
  Distance Freight = Speed Freight × Time Freight ........ (i)
  
  Distance Passenger = Speed Passenger × Time Passenger ........ (ii)
  
  Distance Freight = Distance Passenger
  
  ⇒ Speed Freight × Time Freight = Speed Passenger × Time Passenger
  
  ⇒ Speed Freight × 6 = 60 × 4
  
  ⇒ Speed Freight = 40 km/hr
• 7 years agoHelpfull: Yes(2) No(0)
• Distance travelled by Passenger train=16*4=64km
  so,time taken by freight train=4+2=6hr
  then, avg speed of freight train=64/6=10.67km/hr
  
• 9 years agoHelpfull: Yes(1) No(0)
• speed of the freight train be x km/hr
  speed of the passenger train is 16 km/hr
  Now the passenger train overtakes the freight train after 4 hrs, so the freight train by this time would have travelled for 6 hrs(2hrs+4hrs).
  therefore distance travelled by freight train in 6hrs = distance travelled by passenger train in 4hrs
  x*6=16*4
  6x=64
  
  x=10.67 km/hr
• 8 years agoHelpfull: Yes(1) No(0)
• (16 - x)*4 = 2x
  find x from here
  
  x = 64/6
• 7 years agoHelpfull: Yes(0) No(0)