alleryGoing uphill a lorry averages 20 km/h and coming down the same road 30 km/h. Average for the whole trip?
A22 km/h
B25 km/h
C24 km/h
D26 km/h
Answer & Solution
Correct answer: C. 24 km/h
Equal distances give 2 x 20 x 30 / 50 = 24 km/h.
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