January 04, 2017

Boats and Streams #1 - Quantitative Aptitude for IBPS PO & Clerk exams

Quantitative Aptitude for IBPS, SBI, RBI, LIC, IPPB exams


Boats and Streams


Formulas

Speed = Distance/Time
D = S ✖ T
  1. Speed of the boat/man in still water = U
  2. Speed of the river/current = V
  3. Speed downstream = U + V
  4. Speed upstream = U - V
  5. Time downstream = D / (U+V)
  6. Time upstream = D / (U-V)

Problems


  1. A boat can travel with a speed of 12 kmph in still water. If the speed of the stream is 6 kmph, find the time taken by the boat to go 72 km down stream.
    1. 2 hrs
    2. 3 hrs
    3. 4 hr
    4. None of these
  2. A boat can travel along with the stream with a speed of 20 kmph. The speed of the river is 5 kmph. What is the speed of the boat against the current?
    1. 5 kmph
    2. 10 kmph
    3. 15 kmph
    4. 8 kmph
  3. A man rows 13 km upstream and 28 km downstream in 5 hr each. What is the speed of the river?
    Boats and Streams - Quantitative Aptitude for IBPS PO, Clerk mains, SBI, RBI Assistant LIC, IPPB Exams
    1. 1.5 kmph
    2. 2 kmph
    3. 2.5 kmph
    4. 3 kmph
  4. If a man rows at 6 kmph in still water and 4.5 kmph against the current, then his rate of rowing along the current is?
    1. 9.5 kmph
    2. 5. 25 kmph
    3. 7.5 kmph
    4. 9 kmph
  5. A boat running upstream takes 9 hrs to cover a certain distance. It takes 6 hours to cover the same distance downstream. What is the ratio of the speed of the boat and speed of the river?
    1. 3 : 2
    2. 2 : 5
    3. 5 : 1
    4. 1 : 3

Answers

  1. 3
  2. 2
  3. 1
  4. 3
  5. 3

Boats and Streams - Practice Sets


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