Multiple choice

A man walks at a speed of $4$ km/hr and runs at a speed of $8$ km/hr. How much time will the man require to cover a distance of $24$ km if he completes half of his journey walking and half running?

  1. $5$ hrs
  2. $2.2$ hrs
  3. $9$ hrs
  4. $4.5$ hrs
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Total distance = 24 km. Half distance = 12 km. Time walking = 12 / 4 = 3 hours. Time running = 12 / 8 = 1.5 hours. Total time = 3 + 1.5 = 4.5 hours.

AI explanation

The total distance is 24 km, so half of the journey is 12 km walking and 12 km running. Using the Time equals Distance divided by Speed formula, the time taken walking is 12 divided by 4, which is 3 hours. The time taken running is 12 divided by 8, which equals 1.5 hours. The total time required is 3 + 1.5, resulting in 4.5 hours.

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