Exams › SSC CGL (Prelims) › General

A man walks at 4 km/h for 10 km and then at 5 km/h for 15 km. What is his average speed for the whole journey?

1. 4.8 km/h
2. 4.54 km/h
3. 5.1 km/h
4. 4.2 km/h

Correct answer: 4.54 km/h

Solution

Total distance = 10 + 15 = 25 km. Time taken = 10/4 + 15/5 = 2.5 + 3 = 5.5 hours. Average speed = 25/5.5 = 4.545... km/h, which is 4.54 km/h.

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