Multiple choice

A person goes along the stream and return in 8 hours. If the speed of person in still water is 4 kmph and that of current is 2kmph. Find the distance covered by person.

  1. 6 km

  2. 10 km

  3. 12 km

  4. 16 km

  5. 20 km
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Let the distance be d km. Downstream speed = 4+2 = 6 kmph, upstream speed = 4-2 = 2 kmph. Time downstream = d/6, time upstream = d/2. Total time: d/6 + d/2 = 8 hours. Solving: d/6 + 3d/6 = 4d/6 = 8, so d = 12 km. The person travels 12 km each way, covering 24 km total.

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