Boats and Streams Practice Question and Answer

Q:

If a sailer sails 12 km distance within 5 hours against the flow of a river. If he sails 22 km distance in same time along the flow of the river. Then velocity of the river is _______

2050 0

  • 1
    1 km / hour
    Correct
    Wrong
  • 2
    2 km / hour
    Correct
    Wrong
  • 3
    1.5 km / hour
    Correct
    Wrong
  • 4
    2.5 km / hour
    Correct
    Wrong
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Answer : 1. "1 km / hour "

Q:

A boat covers 35 km downstream in 2 h and covers the same distance upstream in 7 h. Find the speed (in km/h) of the boat in still water.  

977 0

  • 1
    11.25
    Correct
    Wrong
  • 2
    28.75
    Correct
    Wrong
  • 3
    18.25
    Correct
    Wrong
  • 4
    10.55
    Correct
    Wrong
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Answer : 1. "11.25 "

Q:

A boat covers 48 km. upstream and 72 km. downstream in 12 hours, while it covers 72 km. upstream and 48 km. downstream is 13 hours. The speed of stream is -

890 0

  • 1
    2.5 kmph
    Correct
    Wrong
  • 2
    4 kmph
    Correct
    Wrong
  • 3
    2 kmph
    Correct
    Wrong
  • 4
    2.2 kmph
    Correct
    Wrong
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Answer : 3. "2 kmph"

Q:

A boat goes from A to B in upstream and come back from B to A downstream taking a total time of 3.5 hours. If the speed of boat in still water is 7 km/hr and the speed of stream is 5 km/hr. Find the distance between A and B. 

870 0

  • 1
    4 km
    Correct
    Wrong
  • 2
    6 km
    Correct
    Wrong
  • 3
    5 km
    Correct
    Wrong
  • 4
    7.5 km
    Correct
    Wrong
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Answer : 2. "6 km"

Q:

A boat goes 15 km in an hour in still water, and takes thrice the time to cover the same distance upstream. The speed of the current (in km / hr) is –

828 0

  • 1
    13 km/hr
    Correct
    Wrong
  • 2
    14 km/hr
    Correct
    Wrong
  • 3
    13 km/hr
    Correct
    Wrong
  • 4
    14 km/hr
    Correct
    Wrong
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Answer : 2. "14 km/hr"

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Answer : 3. "53.33 km/h"

Q:

A man can row 10 km/h in still water. When the river is running at a speed of 4.5 km/h, then it takes him 2 h to row to a place and comes back to the initial point . How far is the place (in km) (rounded off to two decimal places)?

769 0

  • 1
    5.50
    Correct
    Wrong
  • 2
    8.98
    Correct
    Wrong
  • 3
    7.98
    Correct
    Wrong
  • 4
    6.25
    Correct
    Wrong
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Answer : 3. "7.98 "

Q:

A man can row downstream at a speed of 15 km/h and upstream at 11 km/h. Find his speed in still water and the speed of the current, respectively. [Give both your answers in km/h]

670 0

  • 1
    13 ; 5
    Correct
    Wrong
  • 2
    11 ; 4
    Correct
    Wrong
  • 3
    13 ; 2
    Correct
    Wrong
  • 4
    13 ; 6
    Correct
    Wrong
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Answer : 3. "13 ; 2 "

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