A man drives to a town at 40 km/h and returns by the same road at 60 km/h. His average speed for the whole journey is:

  1. 52 km/h
  2. 44 km/h
  3. 48 km/h
  4. 50 km/h
Answer

C) 48 km/h

For equal distances, average speed = dfrac2xyx+y = dfrac2 40 60100 = 48 km/h (not the simple average 50).

Quantitative Reasoning MCQ · More Speed, Time, Work & Ages MCQs · Practise