Multiple choice

A man can swim at the rate of 4 km/hr. in still water, if the speed of the water is 2 km/hr., then the time taken by him to swim 10 km upstream is

  1. $2(1/2) hrs$
  2. $3(1/2) hrs$
  3. $5 hrs$
  4. $4 hrs$
  5. $4(1/2) hrs$
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Upstream speed = swimmer speed - current speed = 4 - 2 = 2 km/hr. Time = Distance ÷ Speed = 10 ÷ 2 = 5 hours.

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