Boats and Streams Problem Practice Question and Answer

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Answer : 2. "6 hr. "

Q:

A motorboat, whose speed is 45 km./hr. in still water goes 180 km. downstream and comes back in a total of 9 hours. The speed of the stream (in km/hr.) is-

2399 0

  • 1
    12
    Correct
    Wrong
  • 2
    21
    Correct
    Wrong
  • 3
    18
    Correct
    Wrong
  • 4
    10
    Correct
    Wrong
  • 5
    15
    Correct
    Wrong
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Answer : 5. "15"

Q:

A boat goes 75 km upstream in 3 hours and 60 km downstream in 1.5 hours. Then the speed of the boat in still water is: 

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  • 1
    65 kmph
    Correct
    Wrong
  • 2
    60 kmph
    Correct
    Wrong
  • 3
    32.5 kmph
    Correct
    Wrong
  • 4
    30 kmph
    Correct
    Wrong
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Answer : 3. "32.5 kmph "

Q:

A man can row 30 km downstream and return in a total of 8 hours. If the speed of the boat in still water is four times the speed of the current, then the speed of the current is: 

2016 0

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

Q:

A man goes downstream with a boat to some destination and returns upstream to his original place in 5 hours. If the speed of the boat in still water and the stream are 10 km/hr and 4 km/hr respectively, the distance of the destination from the starting place is : 

1761 0

  • 1
    21 km
    Correct
    Wrong
  • 2
    25 km
    Correct
    Wrong
  • 3
    16 km
    Correct
    Wrong
  • 4
    18 km
    Correct
    Wrong
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Answer : 1. "21 km "

Q:

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

1512 0

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

Q:

A boat goes 12 km downstream and comes back to the starting point in 3 hours. If the speed of the current is 3 km/hr, then the speed (in km/hr) of the boat in still water is : 

1483 0

  • 1
    8 km/ h
    Correct
    Wrong
  • 2
    6 km/ h
    Correct
    Wrong
  • 3
    12 km/ h
    Correct
    Wrong
  • 4
    9 km/ h
    Correct
    Wrong
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Answer : 4. "9 km/ h "

Q:

A boat running downstreams covers a distance of 30 kms in 2 hours. While coming back the boat takes 6 hours to cover the same distance. If the speed  of the current is half that of the boat, what is the speed of that boat in kmph?

1462 0

  • 1
    15
    Correct
    Wrong
  • 2
    5
    Correct
    Wrong
  • 3
    10
    Correct
    Wrong
  • 4
    Cannot be determined
    Correct
    Wrong
  • 5
    None of these
    Correct
    Wrong
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Answer : 3. "10"

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