Boat and Stream Practice Question and Answer

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: 

1978 0

  • 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:

The ratio of speed of boat in still water to speed of stream is 8 : 1. It takes 4 hours by boat to cover 54 km in downstream & 42 km in upstream. Find the downstream speed of boat.

1921 0

  • 1
    25 kmph
    Correct
    Wrong
  • 2
    24 kmph
    Correct
    Wrong
  • 3
    21 kmph
    Correct
    Wrong
  • 4
    27 kmph
    Correct
    Wrong
  • 5
    23 kmph
    Correct
    Wrong
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Answer : 4. "27 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: 

1641 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 : 

1632 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:

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

1591 0

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

Q: A boat running upstream takes 8 hours 48 minutes to cover a certain distance, while it takes 4 hours to cover the same distance running downstream. What is the ratio between the speed of the boat and speed of the water current respectively? 1537 0

  • 1
    7:4
    Correct
    Wrong
  • 2
    11:4
    Correct
    Wrong
  • 3
    4:7
    Correct
    Wrong
  • 4
    8:3
    Correct
    Wrong
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Answer : 4. "8:3"
Explanation :

Answer: D) 8:3 Explanation: Let the speed of the boat upstream be p kmph and that of downstream be q kmph   Time for upstream = 8 hrs 48 min = 845hrs   Time for downstream = 4 hrs   Distance in both the cases is same.   => p x  845= q x 4   => 44p/5 = 4q   => q = 11p/5    Now, the required ratio of Speed of boat : Speed of water current   = q+p2:q-p2   => (11p/5 + p)/2  : (11p/5 - p)/2   => 8 : 3

Q:

Ratio between speed of boat in still water to speed of stream is 7 : 2. If 126 km is travelled downstream in 3.5 hours then find the difference between speed of boat in still water to speed of stream(in kmph)?

1481 0

  • 1
    15
    Correct
    Wrong
  • 2
    22
    Correct
    Wrong
  • 3
    24
    Correct
    Wrong
  • 4
    20
    Correct
    Wrong
  • 5
    18
    Correct
    Wrong
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Answer : 4. "20"

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 : 

1387 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 "

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