BOAT AND STREAM MCQ SET 1
1. If the speed of a is 9km/hr in still water and the speed is 5 km/hr then find the speed of swimmer against the stream and along the stream .
(a) 4 km/hr , 10 km/hr
(b) 4 km/hr , 14 km/hr
(c) 14 km/hr , 16 km/hr
(d) 14 km/hr , 18 km/hr
Answer: B
2. The speed of a boat when travelling downstream is 32 km/hr , whereas when travelling upstream it is 28 km/hr . What is the speed of the boat in still water and the speed of the stream?
(a) 29 km/hr , 3 km/hr
(b) 30 km/hr , 2 km/hr
(c) 30 km/hr , 8 km/hr
(d) 31 km/hr , 1 km/hr
Answer: B
3. A boat takes 48 minutes to cover 12 km against the steam , if the speed of stream is 2 km/hr then what will be the speed of the boat in still water ?
(a) 17 km/hr
(b) 15 km/hr
(c) 13 km/hr
(d) 12 km/hr
Answer: A
4. A man wishes to cover 1 km distance in river water . In still water he takes 12 minutes to cover it , but in the flowing river he takes 13 minutes . The speed of the flowing water of the river is:
(a) 25 km/h
(b) 5/13 km/h
(c) 22 km/h
(d) 7/12 km/h
Answer: B
5. A boat covers a certain distance , downstream in 2 hours , while it comes back in 2 1/2 hours . If the speed of the stream is 3 km/h , then what is the speed of the boat in still water?
(a) 29 km/h
(b) 25 km/h
(c) 20 km/h
(d) 27 km/h
Answer: D
6. A swimmer walks 30 km along the flow of river in 3 hours 45 minutes and walks 15 km against the flow in 2 hours 30 minutes find the speed of the boat is still water and the speed of flow (in km/hr) .
(a) 8 and 1
(b) 7 and 8
(c) 7 and 1
(d) 9 and 10
Answer: C
7. A boat moves downstream at the rate of 1 km in 71/2 minutes and upstream at the rate of 5 km an hour . What is the speed of the boat in the still water?
(a) 2 km/hr
(b) 6ยฝ km/hr
(c) 4 km/hr
(d) 3ยฝ km/hr
ย Answer: B
8. A boat goes downstream in one third the time it takes to go upstream . Then , the ratio between the speed of boat is still water and that of the stream is :
(a) 3 : 1
(b) 1 : 3
(c) 1 : 2
(d) 2 : 1
Answer: D
9. The speed of a boat in still water is 5 1/3 km/h . It is found that the boat takes thrice as much time to row up than it does to row down the same distance in the river stream . Find the speed of the river stream .
(a) 23/27 m/sec
(b) 22/27 m/sec
(c) 20/27 m/sec
(d) 19/27 m/sec
Answer: C
10. The speed of boat in still water is thrice the speed of stream . If takes 6 hours to go 48 km against the stream then what is the speed of boat is still water in kilometer per hour?
(a) 10
(b) 8
(c) 12
(d) 14
Answer: C
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