Physicsmedium · Past Paper
A car travels from A to B at 20 km/h and from B to A at 30 km/h. The average speed for the whole journey is:
A25 km/h
B24 km/h
C50 km/h
D10 km/h
✓ Correct Answer: B — 24 km/h
Avg speed = (2 * 20 * 30) / (20 + 30) = 1200 / 50 = 24 km/h.
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