๐Ÿ“ข Too many exams? Donโ€™t know which one suits you best? Book Your Free Expert ๐Ÿ‘‰ call Now!

  • google app store apple app store
  • โœ–

      Question

      A boatman rows 8 km in 12 minutes, along the stream and

      36 km in 3 hours against the stream. The speed of the stream is:
      A 26 km/hr Correct Answer Incorrect Answer
      B 7 km/hr Correct Answer Incorrect Answer
      C 20 km/hr Correct Answer Incorrect Answer
      D 10 km/hr Correct Answer Incorrect Answer
      E 14 km/hr Correct Answer Incorrect Answer

      Solution

      Rate downstream = 8/12 x 60 = 40 km/hr Rate upstream = 36/3 = 12 km/hr Speed of current = 1/2 (Rate downstream – Rate upstream) ⇒ 1/2 (40 – 12) km/hr = 14 km/hr

      Practice Next
      ask-question