On a 120 km track a train travels the first 30km at the Uniform speed of 30km/ hr calculate speed with which the train should move rest of the track so as to average 60km/ hr for the entire trip.

On a 120 km track a train travels the first 30km at the Uniform speed

1.	On a 120 km track a train travels the first 30km at the Uniform speed of 30km/ hr calculate speed with which the train should move rest of the track so as to average 60km/ hr for the entire trip.
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On a 120 km track a train travels the first 30km at the Uniform speed of 30km/ hr calculate speed with which the train should move rest of the track so as to average 60km/ hr for the entire trip.

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