Boats and Streams Practice Question and Answer

Q:

A Man rows to a place 63 km far and comes back in 16 hours. He finds that he can row 18 km with the flow in the same time taken to row 14 km against the flow. What is the speed of the stream?

574 0

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

Q:

A boat moves 25km upstream and 39km downstream in 8 hours. It travels 35km upstream and 52km downstream in 11 hours. What is the speed of the stream if it travels at a uniform speed?

564 0

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

Q:

A boat starts travelling from point P, travels to point Q then returns to point P. The boat takes 12 hours to complete the journey. The speed of the stream is 5 km/hour and the speed of the boat in still water is 10 km/hour. What is the distance between P and Q?

517 0

  • 1
    45
    Correct
    Wrong
  • 2
    25
    Correct
    Wrong
  • 3
    35
    Correct
    Wrong
  • 4
    55
    Correct
    Wrong
  • 5
    60
    Correct
    Wrong
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Answer : 1. "45"

Q:

The speed of a boat in still water is 10 km/h. The speed of the stream is 2 km/h. What is the total distance that the boat will travel if it is rowed for 4 hours upstream and 3 hours downstream?

488 0

  • 1
    70 km
    Correct
    Wrong
  • 2
    72 km
    Correct
    Wrong
  • 3
    64 km
    Correct
    Wrong
  • 4
    68 km
    Correct
    Wrong
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Answer : 4. "68 km"

Q:

On a river, Q is the mid-point between two points P and R on the same bank of the river. A boat can go from P to Q and back in 12 hours, and from P to R in 16 hours 40 min. How long would it take to go from R to P?

439 0

  • 1
    $$3{3\over7}hr$$
    Correct
    Wrong
  • 2
    $$7{4\over3}hr$$
    Correct
    Wrong
  • 3
    $$6{2\over3}hr$$
    Correct
    Wrong
  • 4
    $$7{1\over3}hr$$
    Correct
    Wrong
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Answer : 4. "$$7{1\over3}hr$$"

Q:

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

433 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:

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. "$$32000 m^3 $$"

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