Boats & Streams

J&K Bank Banking Associate · Quantitative Aptitude · 82 practice questions with answers and explanations: 46 Easy, 36 Medium, 0 Hard.

Sample questions

Sample Easy question 1

A boat goes downstream at 20 km/h and upstream at 16 km/h. What is its speed in still water (in km/h)?

  1. 4
  2. 2
  3. 18
  4. 19
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Answer: C. Speed in still water = (downstream + upstream)/2 = (20 + 16)/2 = 18 km/h.

Sample Easy question 2

A boat goes downstream at 17 km/h and upstream at 7 km/h. What is the speed of the stream (in km/h)?

  1. 10
  2. 12
  3. 5
  4. 6
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Answer: C. Speed of the stream = (downstream − upstream)/2 = (17 − 7)/2 = 5 km/h.

Sample Easy question 3

A boat's speed in still water is 12 km/h and the speed of the stream is 2 km/h. What is its downstream speed (in km/h)?

  1. 24
  2. 14
  3. 16
  4. 10
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Answer: B. Downstream speed = 12 + 2 = 14 km/h.

Sample Medium question 4

A boat goes downstream at 22 km/h and upstream at 14 km/h. What is the speed of the stream (in km/h)?

  1. 18
  2. 4
  3. 5
  4. 8
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Answer: B. Speed of the stream = (downstream − upstream)/2 = (22 − 14)/2 = 4 km/h.

Sample Medium question 5

A boat's speed in still water is 12 km/h and the stream flows at 4 km/h. How long will it take to go 48 km downstream (in hours)?

  1. 3
  2. 4
  3. 6
  4. 2
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Answer: A. Downstream speed = 16 km/h; time = 48/16 = 3 hours.

Sample Medium question 6

A boat goes downstream at 17 km/h and upstream at 13 km/h. What is the speed of the stream (in km/h)?

  1. 4
  2. 15
  3. 2
  4. 3
Show answer

Answer: C. Speed of the stream = (downstream − upstream)/2 = (17 − 13)/2 = 2 km/h.

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