Multiple Choice Questions on Distance between Lucknow and Bareilly is 360 km Find the speed of boat in still water Statement I Ti........... for IBPS RRB - Office Assistant/ Clerical Exam Preparation

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Multiple Choice Questions

Distance between Lucknow and Bareilly is 360 km Find the speed of boat in still water Statement I Ti...........

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    Distance between Lucknow and Bareilly is 360 km. Find the speed of boat in still water.

    Statement I: Time taken by boat to travel from Lucknow to Bareilly downstream and come back is 30 hours.

    Statement II: Time taken by boat from Lucknow to Bareilly and come back is 28.8 hours if the water is still.

    Both are necessary
    Incorrect Answer
    Only Statement I
    Incorrect Answer
    Only Statement II
    Correct Answer
    Either I or II
    Incorrect Answer

    Both are not sufficient

    Incorrect Answer
    Explanation:

    From I: 360/(b+s) + 360/(b-s) = 30
    => 240b = (b2 – s2)
    This cannot solve alone.
    From II: 360/b + 360/b = 28.8
    => b = 25 km/hr
    This statement alone is sufficient.

    Hence, option 3 is the correct answer.

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