Multiple choice

Two men start together to walk a certain distance at a speed of 4 km/h and 3 km/h, respectively. The former arrives half an hour earlier than the latter. Find the distance covered by them.

  1. 8 km

  2. 7 km

  3. 6 km

  4. 9 km

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Let D be the distance. Time taken by first = D/4, time by second = D/3. D/3 - D/4 = 0.5. D/12 = 0.5, so D = 6 km.

AI explanation

Let the distance be D kilometers, so the difference in travel times between the first and second man is D divided by 3 minus D divided by 4. Set this difference equal to half an hour to get D divided by 3 minus D divided by 4 equals one half. Solving this yields D divided by 12 equals one half, which gives a distance of 6 kilometers.