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A man, on tour, travels first 160 km at ...

A man, on tour, travels first 160 km at 64 km/h and the next 160 km at 80 km/h. The average speed for the first 320 km of the tour is

A

71 km/h

B

71.11 km/h

C

72 km/h

D

72.12 km/h

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The correct Answer is:
B
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