1. A man's speed with the current is 21 km/hr and the speed of the current is 3.5 km/hr. The man's speed (in kmph) against the current is.....
A) 12 B) 13.5 C) 14 D) 15.5
2. In one hour, a boat goes 18 km/hr along the stream and 6.5 km/hr against the stream. The speed of the boat in still water (in km/hr) is....
A) 14.75 B) 11.75 C) 13.50 D) 12.25
3. The speed of a boat in still water is 12.5 km/hr and the rate of current is 3.5 km/hr. The distance ( in kms) travelled downstream in 18 minutes is...
A) 5.4 B) 4.2 C) 4.8 D) 4.5
4. A boat goes 32 km upstream in 8 hours and downstream in 1.6 hours. How much time (in hours) will this boat take to travel 54 km in still water?
A) 5.7 B) 5.2 C) 4.5 D) 4.8
5. A boat can travel with a speed of 14.5 km/hr in still water. If the speed of the stream is 6.5 km/hr, find the time (in hours) taken by the boat to go 99.75 km downstream.
A) 4.50 B) 4.75 C) 4.80 D) 4.25
6. Zaheer rows in still water with a speed of 5.75 kmph to go to a certain place and comes back. Find his averagen speed (in kmph) for the whole journey, if the river is flowing with a speed of 2.25 kmph.
A) 5.90 B) 5.85 C) 4.50 D) 4.87
7. A motorboat, whose speed is 8 km/hr in still water goes 175 km downstream and comes back in a total of 64 hours. The speed of the stream (in km/hr) is:
A) 4.1 B) 4.2 C) 3.75 D) 4.5
8. Speed of a boat in still water is 13 km/hr and speed of the stream is 2.5 km/hr. How much time (in hours) will it take to move upstream of a distance of 136.5 km?
A) 13 B) 14 C) 15.5 D) 16.5
9. The speed of the current is 2 km/h. A motorboat goes 48 km upstream and back again to the starting point in 18 hours. The speed (in km/h) of the motorboat in still water is...
A) 5 B) 6 C)8 D) 9
10. A boat against the current of water goes 10 km/hr and in the direction of the current 18 km/hr. The boat takes 63 to move upward and downward direction from A to B. What is the distance (in kms) between A and B?
A) 405 B) 415 C) 402 D) 445
11. To go a distance of 144 km upstream, A takes 12 hours while it takes her only 9 hours to row the same distance downstream. What is the speed (in kmph) of the stream?
A) 3 B) 2 C) 1 D) 4
12. The ratio of the speed of a motorboatto that of the current of water is 31 : 6. The motorboat starts from a point and covers a certain distance along the current in 4 h 10 min. Find the time taken by the motorboat to come back to its initial point.
A) 4 hours 10 minutes B) 5 hours 50 minutes
C) 6 hours 10 minutes D) 6 hours 20 minutes
13. A boat covers a distance of 80 km downstream in 8 h while it takes 10 h to cover the same distance upstream. What is the speed (in km/h) of the boat in still water?
A) 7 B) 8 C) 9 D) 11
Key
1-C; 2-D; 3-C; 4-C; 5-B; 6-D; 7-D; 8-A; 9-B; 10-A; 11-B; 12-C.
