Boats and Streams Practice Question and Answer

Q:

A man can row upstream at 12 km/hr and dowstream at 18 km/hr. The man's rowing speed in still water is:

421 0

  • 1
    15 km / hr
    Correct
    Wrong
  • 2
    5 km /hr
    Correct
    Wrong
  • 3
    3 km /hr
    Correct
    Wrong
  • 4
    10 km /hr
    Correct
    Wrong
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Answer : 1. "15 km / hr"

Q:

The water in a river is flowing at the rate of 4 km/hr. If the width and depth of the river is 8m and 4m respectively, then how much water will enter the sea in 15 minutes.

401 0

  • 1
    $$60000 m^3 $$
    Correct
    Wrong
  • 2
    $$18000 m^3 $$
    Correct
    Wrong
  • 3
    $$288000 m^3 $$
    Correct
    Wrong
  • 4
    $$32000 m^3 $$
    Correct
    Wrong
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Answer : 4. "$$32000 m^3 $$"

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. 

848 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 –

801 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"

Q:

Speed of a along and against the current are 14 km / hr and 8 kms/hr respectively. The speed of the current is:

435 0

  • 1
    11km/hr
    Correct
    Wrong
  • 2
    6 km/hr
    Correct
    Wrong
  • 3
    1.33 km/hr
    Correct
    Wrong
  • 4
    3 km/hr
    Correct
    Wrong
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Answer : 4. "3 km/hr"

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 _______

2024 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 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 -

877 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:

If the speed of a boat in still water is 20 km/hr and the speed of the current is 5km / hr, then the time taken by the boat to travel 100km with the current is

401 0

  • 1
    2 hr
    Correct
    Wrong
  • 2
    3 hr
    Correct
    Wrong
  • 3
    4 hr
    Correct
    Wrong
  • 4
    7 hr
    Correct
    Wrong
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Answer : 3. "4 hr "

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