Quantitative Aptitude | Questions
Boats and Streams questions with solutions
Boats and Streams is a Quantitative Aptitude topic for competitive exams. It appears across bank and railway exams. This page has 27 solved boats and streams questions written to the official pattern, with a worked solution under each.
- Question 1Easy
The speed of a boat in still water is 10 km/h and the speed of the stream is 2 km/h. How long will the boat take to go 36 km downstream?
- A.2.5
- B.3.0Correct
- C.3.5
- D.4.0
- E.4.5
Show solution
Downstream the stream helps, so the effective speed is 10 + 2 = 12 km/h. The time for 36 km is 36 / 12 = 3 hours. Add the stream speed going downstream and subtract it going up.
- Question 2Easy
A boat's speed in still water is 18 km/h and the stream flows at 2 km/h. Find its upstream speed.
- A.22
- B.10
- C.9
- D.23
- E.16Correct
Show solution
Upstream speed = 18 − 2 = 16 km/h.
- Question 3Easy
The speed of a boat in still water is 10 km/h and the stream flows at 2 km/h. Find the upstream speed of the boat.
- A.6
- B.8Correct
- C.12
- D.10
Show solution
Upstream speed = still-water speed − stream speed = 10 − 2 = 8 km/h.
- Question 4Easy
A boat's speed in still water is 12 km/h and the stream flows at 2 km/h. Find its upstream speed.
- A.5
- B.12
- C.15
- D.10Correct
- E.8
Show solution
Upstream speed = 12 − 2 = 10 km/h.
- Question 5Easy
A boat's speed in still water is 12 km/h and the stream flows at 3 km/h. Find its upstream speed.
- A.1
- B.9Correct
- C.17
- D.10
- E.8
Show solution
Upstream speed = 12 − 3 = 9 km/h.
- Question 6Easy
The speed of a boat in still water is 12 km/h and the speed of the stream is 3 km/h. How many hours will it take to travel 30 km downstream?
- A.2.5
- B.2Correct
- C.3
- D.1.5
Show solution
Downstream speed = 12 + 3 = 15 km/h, so time = 30 ÷ 15 = 2 hours.
- Question 7Easy
A boat's speed in still water is 12 km/h and the stream flows at 5 km/h. Find its downstream speed.
- A.12
- B.17Correct
- C.14
- D.20
- E.22
Show solution
Downstream speed = 12 + 5 = 17 km/h.
- Question 8Easy
A boat's speed in still water is 18 km/h and the stream flows at 5 km/h. Find its downstream speed.
- A.19
- B.25
- C.21
- D.23Correct
- E.27
Show solution
Downstream speed = 18 + 5 = 23 km/h.
- Question 9Moderate
A boat's speed in still water is 18 km/h and the stream flows at 3 km/h. Find its downstream speed.
- A.31
- B.21Correct
- C.25
- D.11
- E.17
Show solution
Downstream speed = 18 + 3 = 21 km/h.
- Question 10Moderate
A boat goes 20 km downstream in 2 hours and returns the same distance upstream in 4 hours. Find the speed of the boat in still water.
- A.8
- B.6.5
- C.7.5Correct
- D.7
Show solution
Downstream speed is 20/2 = 10 km/h and upstream 20/4 = 5 km/h. Still-water speed is their average: (10 + 5)/2 = 7.5 km/h.
- Question 11Moderate
A boat's speed in still water is 12 km/h and the stream flows at 4 km/h. Find its downstream speed.
- A.14
- B.8
- C.24
- D.16Correct
- E.18
Show solution
Downstream speed = 12 + 4 = 16 km/h.
- Question 12Moderate
A boat's speed in still water is 8 km/h and the stream flows at 2 km/h. Find its downstream speed.
- A.8
- B.14
- C.6
- D.10Correct
- E.12
Show solution
Downstream speed = 8 + 2 = 10 km/h.
These are 12 of 27 boats and streams questions in the bank. Attempt the rest with instant feedback in the practice drills, or under a clock in the mock tests.
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Frequently asked questions
How many Boats and Streams questions are here?
This page shows 12 worked boats and streams questions from a bank of 27, spanning 8 easy, 14 moderate and 5 hard. The full set is available to attempt in the timed-free practice drills and the mock tests.
Which exams ask Boats and Streams questions?
Boats and Streams is a standard Quantitative Aptitude topic across bank and railway recruitment exams.
Are these Boats and Streams questions free, and are the answers reliable?
Yes. Every question is free, written in-house to the exam pattern rather than copied from a real paper, and the numeric answer keys are recomputed independently at build time — a wrong key fails the build rather than reaching you.