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  • A bus travels a distance of 120 km with a speed of 40 km/her and returns with a speed of 30 km/hr. Calculate the average speed for the entire journey.

A bus travels a distance of 120 km with a speed of 40 km/her and returns with a speed of 30 km/hr. Calculate the average speed for the entire journey.

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\text{average speed}=\frac{total \ distance \ covered}{Total \ time \ taken}

\text{average speed}=\frac{240}{\frac{120}{40}+\frac{120}{30}}=\frac{2 \times40\times30}{40+30}=\frac{240}{7}Km/h=34.28 Km/h

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Safeer PP

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