Boat and Stream Questions and answers

  1. Aptitude
    1. Compound interest
    2. Boat and Stream
    3. Trains
    4. Percentage
    5. Discount
    6. Mixture and Allegation
    7. Unitary Method
    8. Work and Wages
    9. Pipes and Cisterns
    10. Linear Equations
    11. Approximation
    12. Word problems
    13. Number System
    14. Time and Distance
    15. Average
    16. Ratio and Proportions
    17. Profit and Loss
    18. Partnership
    19. Permutation and combination
    20. Probability
    21. Problem on ages
    22. Time and work
    23. Simple and compound interest
    24. Mensuration
    25. Number series
21). A motorboat can travel at 10 km/h in still water. It travelled 91km downstream in a river and then returned to the same place, taking altogether 20 h. The rate of flow of river is
A). 3 km/h
B). 4 km/h
C). 2 km/h
D). 5 km/h
22). A man can row against the current three-fourth of a kilometre in 15 min and returns same distance in 10 min, then ratio of his speed to that of current is
A). 3 : 5
B). 5 : 3
C). 1 : 5
D). 5 : 1
23). The speed of the current is 5 km/h. A motorboat goes 10 km upstream and back again to the starting point in 50 min. The speed, (in km/h) of the motorboat in still water is
A). 20 km/h
B). 26 km/h
C). 25 km/h
D). 28 km/h
24). A man can row 6 km/h in still water. If the speed of the current is 2 km/h, it takes 3 h more in upstream than in the downstream for the same distance. The distance is
A). 30 km
B). 24 km
C). 20 km
D). 32km
25). A boat goes 48 km downstream in 20 h. It takes 4 h more to cover the same distance against the stream. What is the speed of the boat in still water?
A). 2.2 km/h
B). 2 km/h
C). 4 km/h
D). 4.2 km/h


26). Pawan can row 24 km/h in still water. When the river is running at 4.8 km/h, it takes him 1 h to row to a place and to come back. How far is the place?
A). 11.52 km
B). 14 km
C). 12.52 km
D). 15 km
27). Sameer can row a certain distance downstream in 24 h and can come back covering the same distance in 36 h. If the stream flows at the rate of 12 km/h, find the speed of Sameer in still water.
A). 30 km/h
B). 15 km/h
C). 40 km/h
D). 60 km/h
28). A sailor sails a distance of 48 km along the flow of a river in 8 h. If It takes 12 h to return the same distance, then the speed of the flow of the river is
A). 0.5 km/h
B). 1 km/h
C). 1.5 km/h
D). 2 km/h
29). 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). 4 h 20 min
B). 3 h 40 min
C). 2 h 40 min
D). 2 h 55 min
30). A boat has to travel upstream 20 km distance from point X of a river to point Y. The total time taken by boat in travelling from point X to Y and Y to X is 41 min 40 s. What is the speed of the boat?
A). 66 km/h
B). 72 km/h
C). 48 km/h
D). Cannot be determined
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