Multiple Choice Questions on 39 O 39 is the centre of the circle AB is a chord of the circle OM perp AB If AB 20 cm OM 2 radic 1........... for Mathematics - All Exams Preparation

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Multiple Choice Questions

39 O 39 is the centre of the circle AB is a chord of the circle OM perp AB If AB 20 cm OM 2 radic 1...........

Quantitative Aptitude ( CCS) Geometry
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    'O' is the centre of the circle, AB is a chord of the circle, OM ⊥ AB. If AB = 20 cm, OM = 2√11cm, then radius of the circle is

    11 cm

    Incorrect Answer

    12 cm

    Correct Answer

    13 cm

    Incorrect Answer

    14 cm

    Incorrect Answer
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    Explanation:


    AB = 20 cm
    ∴  AM = MB = 10 cm
    CM = 2 √11 cm
    In ΔAOM, By pythagoras theorem
    ∴  Radius OA 
    = √(OM2 + AM2)=√(2√11)2 +102=√144= 12 cm

    By: MIRZA SADDAM HUSSAIN
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