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A man on tour travels first 160 km at 64 km/hr and the next 160 km at 80 km/hr. Find the average speed for first 320 km of tour.

A. 70.11 km/hr

B. 71.11 km/hr

C. 72.11 km/hr

D. 73.11 km/hr

Correct Answer : B.


We know Time = Distance/speed
So total time taken =16064+16080=92 hr
Time taken for 320 Km = 320×29=71.11km/hr

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