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. The average speed of the freight train was?

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pratibha

  • Nov 5th, 2007
 

10 2/6 km/hr 

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Deepa Thomas

  • Nov 15th, 2012
 

passenger train take (4+2) hours to overtake freight train at speed 16 km/hr
so D=6*16
similarly
let s be the speed of freight train and take 4 hours to reach the overtake point P.
so Distance covered D=s*4.
so both cover same distance to reach over take point p
equating
S*4=16*6
so S=10.6

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