Multiple choice

A man travelled first half of his journey at a speed of 60 kmph and the second half of his journey at a speed of 40 kmph. Find the average speed of the man.

  1. 52.5 kmph

  2. 50 kmph

  3. 57.5 kmph

  4. 55 kmph
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B Correct answer
AI explanation

Since the distance traveled in both halves of the journey is equal, we use the harmonic mean formula for average speed: 2xy divided by (x + y). Substituting the given speeds gives 2 times 60 times 40 divided by (60 + 40), which equals 4800 divided by 100. The average speed is 50 kmph.

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