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Arithmetic Aptitude :: Boats and Streams

  1. A boatman goes 2 km against the current of the stream in 1 hour and goes 1 km along the current in 10 minutes. How long will it take to go 5 km in stationary water?

  2. A.

    40 minutes

    B.

    1 hour

    C.

    1 hr 15 min

    D.

    1 hr 30 min

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  3. A man can row three-quarters of a kilometre against the stream in 11 minutes and down the stream in 7 minutes. The speed (in km/hr) of the man in still water is:

  4. A.

    2

    B.

    3

    C.

    4

    D.

    5

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  5. Speed of a boat in standing water is 9 kmph and the speed of the stream is 1.5 kmph. A man rows to a place at a distance of 105 km and comes back to the starting point. The total time taken by him is:

  6. A.

    16 hours

    B.

    18 hours

    C.

    20 hours

    D.

    24 hours

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  7. A man takes twice as long to row a distance against the stream as to row the same distance in favour of the stream. The ratio of the speed of the boat (in still water) and the stream is:

  8. A.

    2 : 1

    B.

    3 : 1

    C.
    3 : 2
    D.

    4 : 3

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  9. A man rows to a place 48 km distant and come back in 14 hours. He finds that he can row 4 km with the stream in the same time as 3 km against the stream. The rate of the stream is:

  10. A.

    1 km/hr

    B.

    1.5 km/hr

    C.

    2 km/hr

    D.

    2.5 km/hr

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