A vehicle travels 4 km with speed of 3 km h⁻¹ and another 4 km with speed of 5 km h⁻¹. Its average speed is:
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Question

A vehicle travels 4 km with speed of 3 km h⁻¹ and another 4 km with speed of 5 km h⁻¹. Its average speed is:

G1 Physics · Accepted Answer

For equal distances, average speed = 2v₁v₂/(v₁+v₂) = 2×3×5/(3+5) = 30/8 = 3.75 km h⁻¹.