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Boats And Streams


1) A man takes 3 hours and 45 minutes to row a boat 15 km downstream of a river and 2 hours and 30 minutes to cover a distance of 5 km upstream. Find the speed of the river current in km/hr.

  1. 1 kmph
  2. 2 kmph
  3. 3 kmph
  4. 4 kmph



2) A man can row seven and half (7 1/2) kmph in still water. If in a river running at 1.5 km an hour, it takes him 50 minutes to row to a place and back, how far off is the place ?

  1. 3 km
  2. 4 km
  3. 5 km
  4. 6 km



3) Anand can row a boat in still water at a speed of 5 kmph. The speed of the stream is 3 kmph. Find the time taken by him to row 40 km downstream (in hours).

  1. 5
  2. 20
  3. 8
  4. 10



4) In one hour, a boat goes 11 km along the stream and 5 km against the stream. The speed of the boat in still water (in km/hr) is :

  1. 3
  2. 5
  3. 8
  4. 9



5) A man can row upstream at 8 kmph and downstream at 13 kmph. The speed of the stream is:

  1. 2.5 km/hr
  2. 4.2 km/hr
  3. 5 km/hr
  4. 10.5 km/hr



6) A man rows downstream 32 km and 14 km upstream. If he covers 6 hours to cover each distance, then the velocity (in kmph) of the current is:

  1. 1/2
  2. 1
  3. 1 1/2
  4. 2



7) A boat running downstream covers a distance of 16 km in 2 hours while for covering the same distance upstream, it takes 4 hours. What is the speed of the boat in still water ?

  1. 4 km/hr
  2. 6 km/hr
  3. 8 km/hr
  4. Data inadequate



8) A boatman goes 2 km against the current of the stream in 1 hour and goes 1 km along the current in 10 minutes. How long will it take to go 5 km in stationary water?

  1. 40 minutes
  2. 1 hour
  3. 1 hr 15 min
  4. 1 hr 30 min



9) A man takes twice as long to row a distance against the stream as to row the same distance in favour of the stream. The ratio of the speed of the boat (in still water) and the stream is:

  1. 2:1
  2. 3:1
  3. 3:2
  4. 4:3



10) If a boat goes 7 km upstream in 42 minutes and the speed of the stream is 3 kmph, then the speed of the boat in still water is:

  1. 4.2 km/hr
  2. 9 km/hr
  3. 13 km/hr
  4. 21 km/hr



11) 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 the speed of the water current respectively ?

  1. 2:1
  2. 3:2
  3. 8:3
  4. Cannot be determined



12) A boat can travel with the speed of 13 km/hr in still water. If the speed of the stream is 4 km/hr , find the time taken by the boat to go 68 km downstream.

  1. 2 hours
  2. 3 hours
  3. 4 hours
  4. 5 hours



13) The speed of a boat in standing water is 9 kmph and the speed of the stream is 1.5 kmph. A man rows to a place at a distance of 105 km and comes back to the starting point. The total time taken by him is :

  1. 16 hours
  2. 18 hours
  3. 20 hours
  4. 24 hours



14) A man can row at 5 kmph in still water. If the velocity of the current is 1 kmph and it takes him 1 hour to row to a place and come back, how far is the place ?

  1. 2.4 km
  2. 2.5 km
  3. 3 km
  4. 3.6 km



15) A boat takes 19 hours for travelling downstream from point A to point B and coming back to a point C midway between A and B. If the velocity of the stream is 4 kmph and the speed of the boat in still water is 14 kmph,what is the distance between A and B ?

  1. 160 km
  2. 180 km
  3. 200 km
  4. 220 km



16) A man can row 9 1/3 kmph in still water and finds that it takes him thrice as much time to row up than as to row down the same distance in the river. The speed of the current is:

  1. 3 1/3 km/hr
  2. 3 1/9 km/hr
  3. 4 2/3 km/hr
  4. 4 1/2 km/hr



17) A boat takes 90 minutes less to travel 36 miles downstream than to travel the same distance upstream. If the speed of the boat in still water is 10 mph, the speed of the stream is :

  1. 2 mph
  2. 2.5 mph
  3. 3 mph
  4. 4 mph



18) A man rows to a place 48 km distant and back in 14 hours. He finds that he can row 4 km with the stream in the same time as 3 km against the stream. The rate of the stream is :

  1. 1 km/hr
  2. 1.5 km/hr
  3. 1.8 km/hr
  4. 3.5 km/hr



19) A and B are two points on a river. Akbar took 6 hours to row from A to b and 8 hours to row from B to A. Find the ratio of the speeds of his boat in still water and the river

  1. 7:1
  2. 4:3
  3. 5:3
  4. 3:1