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Discussion :: Clock

  1. At what time between 4:30 and 5:00 will the hands of a clock be at right angle?

    2. A.
    35Apti Clocks53min. past 4
    B.
    37Apti Clocks54min. past 4
    C.
    38Apti Clocks55min. past 4
    D.
    39Apti Clocks56min. past 4

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    Answer : Option C)

    Explanation:

    As we know, the hands of a clock will be at 90° between H: 30 and (H+1) O'clock at (5H + 15)

    Explanation :

    As we know, the hands of a clock will be at 90° between H: 30 and (H+1) O'clock at (5H + 15) minutes past H O' clock.

    ∴ Required time = (5H + 15)

    Now, H = 4

    = (5*4 + 15)
    = 20 + 15 *

    Apti Clocks61

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