Question

A person covers the first 288 km at a speed of 64 km/h, then travels the next 220 km at a speed of 40 km/h, and finally completes the remaining 288 km at a speed of 48 km/h. What is the average speed of the person for the entire journey?

A 47.25 km/h
B 47.75 km/h
C 49.75 km/h
D 49.25 km/h
E None of these
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