Question

A car travels certain distance with a speed of 50km/h-1 and return with a speed of 40km/h-1 calculate the average speed of whole journey

Answer 1

Answer:

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Explanation:

$average \: distance = \frac{2uv}{u + v} \\ = \frac{2 \times 50 \times 40}{50 + 40} \\ = 44.44km {h}^{ - 1}$