This Article consist of most important ” Boats and Streams Questions and Answers ” topic that are mostly asked in all competitive exams. We collected these questions from the students who appeared in exams. Now try to solve these questions.

## Boats and Streams Questions and Answers

**Question : 1** A man rows 750 m in 675 seconds against the stream and returns in 7 and half minutes. His rowing speed in still water is ?

A. 4 kmph

B. 5 kmph

C. 6 kmph

D. 7 kmph

**Show Answer**

**Correct Answer : ** **B**

**Explanation : **

Rate upstream = (750/675) = 10/9 m/sec

Rate downstream (750/450) m/sec = 5/3 m/sec

Rate in still water = (1/2)*[(10/9) + (5/3)] m/sec.

= 25/18 m/sec

= (25/18)*(18/5) kmph

= 5 kmph

**Question : 2** The speed of a boat in still water in 15 km/hr and the rate of current is 3 km/hr. The distance travelled downstream in 12 minutes is:

A. 1.2 km

B. 1.8 km

C. 2.4 km

D. 3.6 km

**Show Answer**

**Correct Answer : ** D

**Explanation : **

Speed downstream = (15 + 3) kmph = 18 kmph.

Distance traveled = 18 x (12/60) km = 3.6 km.

**Question : 3** 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?

A. 4 km/hr

B. 6 km/hr

C. 8 km/hr

D. Data inadequate

**Show Answer**

**Correct Answer : ** **B**

**Explanation : **

Rate downstream = 16/2 kmph = 8 kmph.

Rate upstream = 16/4 kmph = 4 kmph.

Speed in still water = (1/2) x (8 + 4) kmph = 6 kmph.

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

A. 3 km/hr

B. 5 km/hr

C. 8 km/hr

D. 9 km/hr

**Show Answer**

**Correct Answer : ** **C**

**Explanation : **

Speed in still water = (1/2) x (11 + 5) kmph = 8 kmph.

**Question : 5** A man’s speed with the current is 15 km/hr and the speed of the current is 2.5 km/hr. The man’s speed against the current is:

A. 8.5 km/hr

B. 9 km/hr

C. 10 km/hr

D. 12.5 km/hr

**Show Answer**

**Correct Answer : ** **C**

**Explanation : **

Man’s rate in still water = (15 – 2.5) km/hr = 12.5 km/hr.

Man’s rate against the current = (12.5 – 2.5) km/hr = 10 km/hr.

**Question : 6 ** A boat can travel with a 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.

A. 2 hours

B. 3 hours

C. 4 hours

D. 5 hours

**Show Answer**

**Correct Answer : ** **C**

**Explanation : **

Speed downstream = (13 + 4) km/hr = 17 km/hr.

Time taken to travel 68 km downstream = 68/17 hrs = 4 hrs.