BOAT AND STREAM MCQ SET 3
1. Ravi can row a boat in still water in the speed of 14 km/h . If a river is flowing at the speed of 2 km/h and Ravi takes 3 hours to cover a certain distance upstream then how much time will he take to cover the same distance downstream ?
(a) 2 hr 20 min
(b) 2 hr
(c) 2 hr 15 min
(d) 2 hr 30 min
Answer: C
2. A boat can travel 60 km downstream in 4 hours . If the speed of the boat in still water is 13 km/h , then in what time will it cover 30 km upstream?
(a) 2 8/11 hours
(b) 3 4/7 hours
(c) 2 4/7 hours
(d) 3 5/7 hours
Answer: A
3. A boat can go 15 km downstream and 8 km upstream in 2 h . It can go 20 km downstream and 12 km upstream in 2h 50min . What is the speed in km/h of the boat while going downstream?
(a) 16
(b) 15
(c) 20
(d) 18
Answer: B
4. The speed of a boat downstream is 150% more than its speed upstream . If the time taken by the boat for going 80 km downstream and 50 km upstream is 8.2 hours , then what is speed (in km/h) of the boat downstream?
(a) 16
(b) 30
(c) 24
(d) 25
Answer: D
5. A person rows upstream a distance of 55 km in 5 hours and rows downstream a distance of 75 km in 3 hours . How much time will he take to travel a distance of 96 km in still water?
(a) 4 hours 40 minutes
(b) 5 hours 20 minutes
(c) 6 hours 10 minutes
(d) 5 hours 45 minutes
Answer: B
6. X , Y are two points in a river . Points P and Q divide the straight line XY into three equal parts . The river flows along XY and the time taken by a boat to row from X to Q and from Y to Q are in the ratio of 4 : 5 . The ratio of the speed of the boat downstream that of the river current is equal to:
(a) 3 : 10
(b) 3 : 4
(c) 10 : 3
(d) 4 : 3
Answer: C
7. A boat moves 25 km upstream and 39 km downstream in 8 hours . It travels 35 km upstream and 52 km downstream in 11 hours . What is the speed of the stream if it travels at a uniform speed?
(a) 4 km/h
(b) 5 km/h
(c) 6 km/h
(d) 3 km/h
ย Answer: A
8. A boat covers a certain distance against the stream in 9 hours 36 min and it covers the same distance along the stream in 6 hours . What is the ratio of the speed of the boat in still water to that of the stream?
(a) 13 : 3
(b) 9 : 2
(c) 11 : 6
(d) 8 : 5
Answer: A
9. A boat can go 40 km downstream and 25 km upstream in 7 hours 30 minutes . It can go 48 km downstream and 36 km upstream in 10 hours . What is the speed (in km/h) of the boat in still water ?
(a) 6
(b) 12
(c) 9
(d) 15
Answer: C
10. A boat covers a round trip journey between two points A and B in a river in T hours . If its speed in still water becomes 2 time , it would take 80/161 T hours for the same journey . Find the ratio of its speed in still water to the speed of the river .
(a) 11 : 1
(b) 161 : 40
(c) 1 : 11
(d) 2 : 1
Answer: A
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