Multiple choice

A man rides a bicycle from point A to point B at the speed of 60 km per hour and from point B to point A at the speed of 40 kmph find his average speed.

  1. 40 kmph

  2. 48 kmph

  3. 32 kmph

  4. cannot be determined

  5. None of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Average speed for same distance at different speeds is harmonic mean: 2ab/(a+b) = 2(60)(40)/(60+40) = 4800/100 = 48 kmph. This formula applies because distances are equal.

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