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

      Question

      Speed of a boat in still water is 4 times more than the

      speed of stream. If boat covers 108 km in downstream in 9 hours, then find the time taken by the boat to cover 80 km in upstream.
      A 12 hours Correct Answer Incorrect Answer
      B 10 hours Correct Answer Incorrect Answer
      C 8 hours Correct Answer Incorrect Answer
      D 9 hours Correct Answer Incorrect Answer

      Solution

      Let the speed of stream be ‘x’ km/hr. So, speed of boat in still water = 5 × x = 5x km/hr Downstream speed of boat = 5x + x = 6x km/hr According to question; 6x = 108/9 = 12 Or, x = 2 Upstream speed of the boat = 5x – x = 4x = 4 × 2 = 8 km/hr Required time taken = 80/8 = 10 hours

      Practice Next
      More Boats and streams Questions

      Relevant for Exams:

      ask-question