A car travels the first half of a distance between two places at 30 km h⁻¹ and the second half at 50 km h⁻¹. The average speed for the whole journey is:
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A car travels the first half of a distance between two places at 30 km h⁻¹ and the second half at 50 km h⁻¹. The average speed for the whole journey is:
Options