**1. Rajesh can row 12 km/h in still water. It takes him thrice as long to row up as to row down the river. Find the rate of stream.**

(a) 5 km/h

(b) 4 km/h

(c) 3 km/h

(d) 6 km/h

(e) 9 km/h

**2. A boatman can row 12 km/h in still water. When the river is running at 3 km/h, it takes him 1 h to row to a place and to come back. How far is the place (app. Distance)?**

(a) 4 km

(b) 6 km

(c) 8 km

(d) 10 km

(e) None of these

**3. Rahim rows in still water with a speed of 4.5 km/h to go to a certain place and to come back. Find his average speed for the whole journey, if the river is flowing with a speed of 1.5 km/h.**

(a) 3 km/h

(b) 5 km/h

(c) 4 km/h

(d) 6 km/h

(e) None of these

**4. A boat covers 40 km in an hour with downstream and covers the same distance in 2 h with upstream. Then, find the speed of boat in still water and speed of stream.**

(a) 20 km/h, 10 km/h

(b) 10 km/h, 5 km/h

(c) 30 km/h, 10 km/h

(d) 10 km/h, 5 km/h

(e) None of these

**5. Rahul can row downstream at 10 km/h and upstream at 6 km/h. Find the speed of Rahul in still water and speed of current.**

(a) 7 km/h and 2 km/h

(b) 8 km/h and 6 km/h

(c) 7 km/h and 3 km/h

(d) 8 km/h and 2 km/h

(e) None of the above

**6. A boatman rows 1 km in 5 min along the stream and 6 km in 1 h against the stream. The speed of the boat is**

(a) 3 km/h

(b) 6 km/h

(c) 10 km/h

(d) 12 km/h

(e) None of these

**7. Speed of motorboat in still water is 45 km/h. If the motorboat travels 80 km along the stream in 1 h 20 min, then the time taken by it to cover the same distance against the stream will be**

(a) 140 min

(b) 120 min

(c) 160 min

(d) 155 min

(e) None of these

**8. A yacht running upstream takes 528 min to cover a certain distance, while it takes 240 min to cover the same distance running downstream. What is the ratio between the speed of the current and speed of the yacht, respectively?**

(a) 1 : 2

(b) 5 : 2

(c) 8 : 3

(d) Couldn’t be determined

(e) None of the above

**9. In a river, the ratio of the speed of still boat and speed of a stream in still water is 5 : 2. Again, ratio of the speed of another boat and speed of stream in still water is 4 : 3. What is the ratio of the speeds of the second boat to the first boat in still water?**

(a) 10 : 7

(b) 15 : 8

(c) 4 : 3

(d) 5 : 4

(e) None of the above

**10. X, Y and Z are situated at the bank of river which is flowing at a constant rate. Y is at an equal distance with X and Z. A swimmer Aviral takes 10 h to swim from X to Y and Y to X. Also, he takes 4 h to swim from X to Z. What is the ratio of speed of Aviral in still water and speed of stream?**

(a) 7 : 3

(b) 3 : 5

(c) 2 : 5

(d) 1 : 2

(e) None of the above