A man on tour travels the first 160 km at 64 km/hr and the next 160 km at 80 km/hr. what is the average speed for the first 320 km of the tour?
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1
the average speed is 72 km/
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Given, 160km distance traveled at 64km/h
another 160km distance traveled at 80km/h
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Average speed = (2xS1xS2) / S1+S2
= 2x64x80 / 64+80
= 10240/144
= 71.2 km/h is the average speed
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