logo

CuriousTab

CuriousTab

Discussion


Home Aptitude Boats and Streams See What Others Are Saying!
  • Question
  • A man can row against the current three-fourth of a kilometre in 15 min and returns same distance in 10 min, then ratio of his speed to that of current is?


  • Options
  • A. 3 : 5
  • B. 5 : 3
  • C. 1 : 5
  • D. 5 : 1

  • Correct Answer
  • 5 : 1 

    Explanation

    Let the speed of man and current be U and V km/h, respectively.
    Speed upstream = (U - V) km/h
    Speed down stream = (U + V) km/h
    According to the question,
    (3 x 60)/(4 x 15) = U - V
    ? U - V = 3 ......(i)

    and (3/4) x (60/10) = U + V
    ? U + V = 9/2 ...(ii)

    On adding Eqs. (i) and (ii), we get
    2U = 3 + 9/2
    ? U = 15/4

    On putting the value of U in Eq. (ii), we get
    15/4 + V = 9/2
    V = 9/2 - 15/4 = 18 - 15/4
    ? V = 3/4

    Hence, speed of man U = 15/4 and
    Speed of current V = 3/4
    Hence, required ratio = 15/4 : 3/4 = 5 : 1


  • More questions

    • 1. 
      A and B together can complete a work in 3 days. They started together but after 2 days, B left the work. If the work is completed after 2 more days, B alone could do the work in how many days?

    • Options
    • A. 5
    • B. 6
    • C. 7
    • D. 10
    • Discuss
    • 2. 
      A wheel makes 1000 revolutions in covering a distance of 88 km. the diameter of the wheel is?

    • Options
    • A. 24 meters
    • B. 40 meters
    • C. 28 meters
    • D. 14 meters
    • Discuss
    • 3. 25, 36, 49, 81, 121, 169, 225

    • Options
    • A. 36
    • B. 49
    • C. 121
    • D. 169
    • Discuss
    • 4. 
      (.896 x .752 +.896 x .248) / (.7 x .034 + .7 x.966) =?

    • Options
    • A. 1.28
    • B. 0.976
    • C. 12.8
    • D. 9.76
    • Discuss
    • 5. 
      Einstein goes from Ahmedabad To Lucknow at the speed of 40 km/hr and returned at the speed of 60 km/hr .the average speed of Einstein during the whole journey is

    • Options
    • A. 48 km/hr
    • B. 24 km/hr
    • C. 50 km/hr
    • D. none of these
    • Discuss
    • 6. 
      Today is Monday. After 61 days, it will be

    • Options
    • A. Wednesday
    • B. Saturday
    • C. Tuesday
    • D. Thursday
    • Discuss
    • 7. 9548 + 7314 = 8362 + (?)

    • Options
    • A. 8230
    • B. 8410
    • C. 8500
    • D. 8600
    • E. None of these
    • Discuss
    • 8. 
      The true discount on a certain sum due 1 yr hence at 30% per annum, is ? 240. What is the banker' discount on the same sum for the same time and at the same rate?

    • Options
    • A. ? 400
    • B. ? 212
    • C. ? 312
    • D. ? 445
    • Discuss
    • 9. 
      Calendar of month July is same as that of which month of previous year.

    • Options
    • A. May
    • B. September
    • C. April
    • D. None of these
    • Discuss
    • 10. 
      A coin is successively tossed two times. Find the probability of getting? (1) exactly one head (2)at least one head

    • Options
    • A. 1/2 , 3/4
    • B. 2/3, 1/4
    • C. 1/4, 4/5
    • D. 1/2, 2/3
    • Discuss


    Comments

    There are no comments.

Enter a new Comment