📢 Too many exams? Don’t know which one suits you best? Book Your Free Expert 👉 call Now!
  • google app store apple app store
    • ✖

      Question

      A man can row at 15 km/hr in still water. If the

      velocity of current is 3 km/hr and it takes him 1 hour to row to a place and come back, how far is the place?
      A 7.2 km Correct Answer Incorrect Answer
      B 4.8 km Correct Answer Incorrect Answer
      C 9.6 km Correct Answer Incorrect Answer
      D 2.1 km Correct Answer Incorrect Answer
      E 3.75 km Correct Answer Incorrect Answer

      Solution

      Let the distance be x km. Speed upstream = 15 – 3 = 12 km/hr Speed downstream = 15 + 3 = 18 km/hr ⇒ x/12 + x/18 = 1 ⇒ (3x + 2x)/36 = 1 ⇒ 5x = 36 ⇒ x = 36/5 = 7.2 km

      Practice Next
      More Boats and streams Questions
      ask-question