On a120 km track , a train travels the first 30km at a uniform speed of 30 km /hr calculate the speed with which the train should move rest of the track so as to that the average speed of 60km /hr for the entire trip
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av. velocity of whole track is 60km/h.
and train had travelled 30 km with 30km/h.
v~=(v1+V2)/2
60=(30+x)/2
120=30+x
90=x
and train had travelled 30 km with 30km/h.
v~=(v1+V2)/2
60=(30+x)/2
120=30+x
90=x
geniusmen:
bhavya u understand
the concept
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