A car travels east at

PHYSICS · Single correct · A Level · Physics · Mechanics and materials · Mechanics and materials

Problem

A car travels 60 km60\,\text{km} east at 40 km/h40\,\text{km/h}, immediately turns around, and returns the same 60 km60\,\text{km} west at 60 km/h60\,\text{km/h}. What is the car's average speed for the whole trip? (a) 50 km/h50\,\text{km/h} (b) 48 km/h48\,\text{km/h} (c) 52 km/h52\,\text{km/h} (d) 24 km/h24\,\text{km/h}

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