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Discussion :: Clock

  1. The angle between the minute hand and the hour hand of a clock when the time is 8.30, is:

  2. A.

    80°

    B.

    75°

    C.

    60°

    D.

    105°

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    Answer : Option B

    Explanation :

    Angle traced by hour hand in\(\frac { 17 } { 2 } \)hrs=[\( \frac { 360 } { 12 } \)x\(\frac { 17 } { 2 }]^0\)= 255°

     

    Angle traced by min. hand in 30 min. =[\( \frac { 360 } { 60} \)x\(30]^o\)== 180°.

     

     Required angle = (255 - 180)° = 75°.


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