Time and Distance Practice Test 1 with solutions

Question : 13 of 40

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A man completes a journey in 5 hours. The first-half of the journey is travelled at the speed of 20 kmph while the second-half is travelled at the speed of 10 kmph. What is the average speed for the whole journey?

40 kmph
40/3 kmph
20 kmph
10 kmph

Validate

Solution:

Speed in the first-half of the distance = 20 kmph
Speed in the second-half of the distance = 10 kmph
Average speed =

{2xy}/{x+y}

{2×20×10}/{20+10}

{400}/{30}

{40}/3

kmph

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