Answers

2015-01-21T21:24:21+05:30

Time taken to travel ist 160 km = Distance/speed = 160/64 hrs

Time taken to travel next 160 km = 160/80

Total time taken= 160/64 + 160/80 hrs = 9/2 hrs

Average speed = 320*2/9 = 71.11 km/hr

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