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Quantitative Aptitude | Boat and Stream | Multiple Choice Question Answer | SSC CGL Exam, CHSL, Railway Exam

1. A man can row 15 km/hr down-stream and 9 km/hr upstream. The speed of the boat in still water is
A. 8 km/hr.
B. 12 km/hr.
C. 10 km/hr.
D. 15 km/hr.

2. A man rows a boat 18 kilometers in 4 hours down-stream and returns upstream in 12 hours. The speed of the stream (in km per hour) is:
A. 1
B. 1.5
C. 1.75
D. 2

3. A man can row at a speed of km/hr in still water. If he takes 2 times as long to row a distance upstream as to row the same distance downstream, then the speed of stream ( in km/hr) is
A. 1.5
B. 11
C. 2
D. 2.5

4. Two boats A and B start towards each other from two places, 108 km apart. The speed of the boat A and B in still water are 12 km/hr and 15 km/hr respectively. If A proceeds down and B up the stream, they will meet after.
A. 4 hours
B. 4.5 hours
C. 5.4 hours
D. 6 hours

5. If a boat goes 100 km down-stream in 10 hours and 75 km upstream in 15 hours, then the speed of the stream is:
A. 2 km/hr
B. 3 km/hr
C. 2.5 km/hr
D. 3.5 km/hr

6. A boat running rows downstream covers a distance of 20 km in 2 hrs while it covers the same distance upstream in 5 hrs. Then speed of the boat in still water is
A. 10 km/hr
B. 7 km/hr
C. 9 km/hr
D. 8 km/hr

7. A sailor goes 12 km downstream in 48 minutes and returns in 1 hour20 minutes. The speed of the sailor in still water is:
A. 13 km/hr
B. 11 km/hr
C. 12.5 km/hr
D. 15 km/hr

Answer:
1. B) 12 km/hr.
2. B) 1.5
3. A) 1.5
4. A) 4 hours
5. C) 2.5 km/hr
6. B) 7 km/hr
7. A) 13 km/hr

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