2 hours after a freight train leaves Delhi a passenger train leaves the same station traveling in the same direction at an average speed of 16 km/hr. After traveling 4 hrs the passenger train overtakes the freight train. The average speed of the freight train was?A. 30B. 40C. 58D. 60

B

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A.N.V.K.Chaitanya

  • Jul 30th, 2015
 

The speed of the freight was 10.6 km/hr
speed of the passenger train=16 km/hr
let speed of the freight train=x km/hr
passenger train overtakes the freight train after 4 hr.
so,
distance traveled by freight train in 6 hr(2 hr+ 4 hr)=distance traveled by passenger train in 4 hr.
x*6=16*4
x=32/3
x=10.6

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