Question

A car travels from City A to City B, which is 240 km apart. It travels the first 120 km at a speed of 60 km/h and the remaining distance at a speed of 80 km/h. Calculate the average speed of the car for the entire trip.

A 68.5 km/h
B 70 km/h
C 72 km/h
D 75 km/h
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