Boat and stream

 The Indian Defence sector is one of the most prestigious and challenging fields that attracts students from various backgrounds. With the increasing demand for personnel in the defence sector, the competition for defence exams has also risen over the years. It requires immense dedication, hard work, and consistent effort to clear the defence exams. To assist the students in their preparation, Indian Defence Era has come up with valuable insights and exam tips that will help students achieve their dream of serving the nation.

Boat and Stream Questions:

1.A boat takes 6 hours to travel 36 km downstream and 9 hours to travel the same distance upstream. What is the speed of the boat in still water?

a) 5 km/h

b) 6 km/h

c) 8 km/h

d) 9 km/h

Answer: c) 8 km/h

2.A man can row at 6 km/h in still water. If the speed of the current is 2 km/h, how long will he take to row 20 km upstream?

a) 3 hours

b) 4 hours

c) 5 hours

d) 6 hours

Answer: b) 4 hours

3.A boat covers 45 km upstream in 9 hours and 60 km downstream in 8 hours. Find the speed of the boat in still water and the speed of the stream.

a) 10 km/h, 2 km/h

b) 11 km/h, 3 km/h

c) 12 km/h, 4 km/h

d) 13 km/h, 5 km/h

Answer: c) 12 km/h, 4 km/h

4.A boat can travel 12 km upstream in 2 hours and 30 km downstream in 3 hours. Find the speed of the boat in still water and the speed of the stream.

a) 8 km/h, 2 km/h

b) 9 km/h, 3 km/h

c) 10 km/h, 4 km/h

d) 11 km/h, 5 km/h

Answer: a) 8 km/h, 2 km/h

5.A boat travels 96 km upstream and 120 km downstream in the same time. If the speed of the stream is 3 km/h, find the speed of the boat in still water.

a) 16 km/h

b) 18 km/h

c) 20 km/h

d) 24 km/h

Answer: b) 18 km/h

6.A boat covers 100 km upstream and 120 km downstream in the same time. If the speed of the boat in still water is 15 km/h, find the speed of the stream.

a) 3 km/h

b) 4 km/h

c) 5 km/h

d) 6 km/h

Answer: c) 5 km/h

7.A boat takes 4 hours to travel 48 km downstream and 5 hours to travel the same distance upstream. Find the speed of the boat in still water and the speed of the stream.

a) 9 km/h, 3 km/h

b) 10 km/h, 4 km/h

c) 11 km/h, 5 km/h

d) 12 km/h, 6 km/h

Answer: b) 10 km/h, 4 km/h

8.A boat travels 60 km upstream and 72 km downstream in the same time. If the speed of the stream is 2 km/h, find the speed of the boat in still water.

a) 10 km/h

b) 12 km/h

c) 15 km/h

Answer: b) 12 km/h

9.A boat covers 80 km downstream and 64 km upstream in the same time. If the speed of the stream is 4 km/h, find the speed of the boat in still water.

a) 10 km/h

b) 12 km/h

c) 15 km/h

d) 18 km/h

Answer: d) 18 km/h

10.A boat covers 36 km upstream and 48 km downstream in the same time. If the speed of the boat in still water is 12 km/h, find the speed of the stream.

a) 2 km/h

b) 3 km/h

c) 4 km/h

d) 5 km/h

Answer: b) 3 km/h

11.A boat takes 4 hours to cover 32 km downstream and 6 hours to cover the same distance upstream. Find the speed of the boat in still water and the speed of the stream.

a) 6 km/h, 2 km/h

b) 7 km/h, 3 km/h

c) 8 km/h, 4 km/h

d) 9 km/h, 5 km/h

Answer: c) 8 km/h, 4 km/h

12.A man can row 12 km/h in still water. If he takes 4 hours to row to a place and back, find the speed of the stream.

a) 2 km/h

b) 3 km/h

c) 4 km/h

d) 5 km/h

Answer: a) 2 km/h

13.A boat takes 3 hours to cover 30 km upstream and 2 hours to cover the same distance downstream. Find the speed of the boat in still water and the speed of the stream.

a) 10 km/h, 2 km/h

b) 12 km/h, 4 km/h

c) 14 km/h, 6 km/h

d) 16 km/h, 8 km/h

Answer: b) 12 km/h, 4 km/h

14.A boat takes 4 hours to cover 64 km downstream and 6 hours to cover the same distance upstream. Find the speed of the boat in still water and the speed of the stream.

a) 10 km/h, 2 km/h

b) 12 km/h, 4 km/h

c) 14 km/h, 6 km/h

d) 16 km/h, 8 km/h

Answer: a) 10 km/h, 2 km/h

15.A man can row 10 km/h in still water. If he takes 6 hours to row to a place and back, find the speed of the stream.

a) 1 km/h

b) 2 km/h

c) 3 km/h

d) 4 km/h

Answer: b) 2 km/h

16.A boat takes 5 hours to travel 40 km downstream and 10 hours to travel the same distance upstream. Find the speed of the boat in still water and the speed of the stream.

a) 5 km/h, 1 km/h

b) 6 km/h, 2 km/h

c) 7 km/h, 3 km/h

d) 8 km/h, 4 km/h

Answer: b) 6 km/h, 2 km/h

17.A boat covers 96 km downstream and 64 km upstream in the same time. If the speed of the boat in still water is 16 km/h, find the speed of the stream.

a) 3 km/h

b) 4 km/h

c) 5 km/h

d) 6 km/h

Answer: b) 4 km/h

18A man can row 15 km/h in still water. If he takes 3 hours to row to a place and back, find the speed of the stream.

a) 1 km/h

b) 2 km/h

c) 3 km/h

d) 4 km/h

Answer: c) 3 km/h

19A boat covers 60 km downstream and 40 km upstream in the same time. If the speed of the boat in still water is 12 km/h, find the speed of the stream.

a) 2 km/h

b) 3 km/h

c) 4 km/h

d) 5 km/h

Answer: a) 2 km/h

20.A boat takes 2.5 hours to travel 25 km downstream and 3.5 hours to travel the same distance upstream. Find the speed of the boat in still water and the speed of the stream.

a) 8 km/h, 2 km/h

b) 9 km/h, 3 km/h

c) 10 km/h, 4 km/h

d) 12 km/h, 6 km/h

Answer: c) 10 km/h, 4 km/h

In conclusion, Boat and Stream problems are a common topic in competitive exams and are often included in defence exams as well. Solving these problems can help candidates improve their problem-solving skills and logical reasoning abilities. As a student preparing for defence exams, it is important to practice a wide range of problems and work on improving your speed and accuracy.