Aptitude - Averages - Discussion

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Q.

Distance between two stations A and B is 778km. A train covers the journey from A to B at 84km per hour and returns back to A with a uniform speed of 56km per hour. Find the average speed of train during the whole journey.  .                          
A. 60 km/hr B. 30.5 km/hr
C. 57 km/hr D. 67.2 km/hr

Answer: Option D
Explaination:

 


Discussion

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