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Aptitude - Aptitude- Speed

Read many objective multiple choice questions of Aptitude - Aptitude- Speed in English. Practise online thousands of questions related to Aptitude - Aptitude- Speed. You can check online answer and try mock tests for Aptitude - Aptitude- Speed Questions provided in English.

A man can row 9 and 1/3 kmph in still water and finds that it takes him thrice as much time to row up than as to row, down the same distance in the river. The speed of the current is ?

  • a
  • b
  • c
  • d
  • OOPS, your answer is incorrect

    Let speed upstream is x kmph.
    Then, speed downstream = 3x kmph.
    Speed in still water = (1/2)(3x + x) kmph = 2x kmph.
    2x = 28/3 x = 14/3
    Speed upstream = 14/3 km/hr, Speed downstream 14 km/hr.
    speed of the current = (1/2)[14 - (14/3)] = 14/3 = 4 and 2/3 kmph

If a man can swim downstream at 6 kmph and upstream at 2 kmph, his speed in still wateris ?

  • a
  • b
  • c
  • d
  • OOPS, your answer is incorrect

    Speed in still water = (1/2) * (6 + 2) km/hr = 4 km/hr

A man can row a boat at 10 kmph in still water. If the speed of the stream is 6 kmph, the time taken to row a distance of 80 km down the stream is?

  • a
  • b
  • c
  • d
  • OOPS, your answer is incorrect

    Speed downstream (10+6) km/hr 16 km/hr.
    Time taken to cover 80 km downstream = (80/16) hrs = 5 hrs.

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