Average Practice Test 7

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Question : 18 of 22

Marks: +1, -0

A motorist travels to a place 150 km away at an average speed of 50 km/h and returns at 30 km/h. His average speed for the whole journey in km/h is:

36.5 km/h
37.5 km/h
35.5 km/h
34.5 km/h
38.5 km/h

Solution:

Average speed

={2xy}/{x+y}

km/h

={2×50×30}/{50+30}=300/80

= 37.5 km/h

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