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A person goes from one point to another point with a speed of 5 km/h and comes back to starting point with a speed of 3 km/h. Find the average speed for the whole journey.?

4.5 km/h
4 km/h
4. 25 km/h
3. 75 km/h

Correct Answer: 3. 75 km/h

Explanation:

Average speed = 2AB/(A + B)
= 2 x 5 x 3/(5 + 3)
= 30/8
= 3.75 km/h

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