Physicsmedium · Past Paper
A body moves from A to B with 40 km/h and returns with 60 km/h. Its average speed is:
A50 km/h
B48 km/h
C0 km/h
D55 km/h
✓ Correct Answer: B — 48 km/h
Avg Speed = 2v1v2 / (v1+v2) = 2*40*60 / (40+60) = 4800 / 100 = 48 km/h.
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