logo

CuriousTab

CuriousTab

Discussion

Home ‣ Aptitude ‣ Boats and Streams Comments
  • Question

  • A boat takes 2 hours to travel from point A to B in still water. To find out its speed upstream, which of the following information is/are required? A. Distance between point A and B. B. Time taken to travel downstream from B to A. C. Speed of the stream of water.


  • Options
  • A. Only A and B
  • B. Only B and C
  • C. All are required
  • D. Any one pair of A and B, B and C or C and A is sufficient

  • Correct Answer
  • Any one pair of A and B, B and C or C and A is sufficient 

    Explanation

    Let distance between A & B = d km
    Let speed in still water = x kmph
    Let speed of current = y kmph

    from the given data,
    d/x = 2

    From A) we get d
    From B) we get d/x+y
    From C) we get y

     

    So, Any one pair of A and B, B and C or C and A is sufficient to give the answer i.e, the speed of upstream.

    • Boats and Streams problems

    Search Results

    • 1. Equal distance is covered by a boat in upstream and in downstream in total 5 hours. Sum of speed of a boat in upstream and downstream is 40 km/hr. Speed of boat in still water is 600% more than the speed of stream. Find theapproximate distance covered by boat in downstream (in km).

    • Options
    • A. 45
    • B. 50
    • C. 55
    • D. 60
      • Discuss
    • 2. Mahesh rows to the place 80 km away and back in 20 hours. He finds that he can row 8 km downstream in the same time as 4 km upstream. The speed of the boat in stillwater is

    • Options
    • A. 9 kmph
    • B. 7 kmph
    • C. 2 kmph
    • D. 5 kmph
      • Discuss
    • 3. A boat travels 24 km upstream in 6 h and 20 km downstream in 4 h. then, the speed of a boat in still water and the speed of current are respectively

    • Options
    • A. 4.5 km/h and 3 km/h
    • B. 4.5 km/h and 0.5 km/h
    • C. 4 km/h and 2 km/h 5 km/h and 2 km/h
    • D. 5 km/h and 2 km/h
      • Discuss
    • 4. A boat goes 4 km upstream and 4 km downstream in 1 hour. The same boat goes 5 km downstream and 3 km upstream in 55 minutes. What is the speed (in km/hr) of oat in still water?

    • Options
    • A. 6.5
    • B. 7.75
    • C. 9
    • D. 10.5
      • Discuss
    • 5. If the boat goes 7 kms upstream in 42 min and speed of the stream is 3 kmph, then the speed of the boat in still water ?

    • Options
    • A. 14 kmph
    • B. 13 kmph
    • C. 12 kmph
    • D. 11 kmph
      • Discuss
    • 6. Choose the most appropriate answer:A boat travels upstream from B to A and downstream from A to B in 3 hours. If the speed of the boat in still water is 9 Km/h and the speed of the current is 3 Km/h, the distance between A and B is

    • Options
    • A. 9 km
    • B. 10 km
    • C. 11 km
    • D. 12 km
      • Discuss
    • 7. If a boat goes a certain distance at 30 km/hr and comes back the same distance at 60 km/hr. What is the average speed (in km/hr) for the total journey?

    • Options
    • A. 45
    • B. 50
    • C. 40
    • D. 35
      • Discuss
    • 8. A steamer moves with a speed of 4.5 km/h in still water to a certain upstream point and comes back to the starting point in a river which flows at 1.5 km/h. The average speed of steamer for the total journey is

    • Options
    • A. 12 km/h
    • B. 10 km/h
    • C. 6 km/h
    • D. 4 km/h
      • Discuss
    • 9. A boat goes a certain distance at 40 km/hr and comes back the same distance at 24 km/hr. What is the average speed (in km/hr) for the total journey?

    • Options
    • A. 32
    • B. 28
    • C. 34
    • D. 30
      • Discuss
    • 10. Speeds of a boat along the current and against the current are 14 km/hr and 7 km/hr respectively. What is the speed of boat (in km/hr) in still water?

    • Options
    • A. 3.5
    • B. 7.5
    • C. 10.5
    • D. 9.5
      • Discuss

    Comments

    There are no comments.
Enter a new Comment




Aptitude

Engineering

Programming

Reasoning

Links

Copyright ©CuriousTab. All rights reserved.