Multiple Choice Questions on Two concentric circles form a ring The inner and outer circumference of the ring are 352 7 m and 528........... for Mathematics - All Exams Preparation

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Multiple Choice Questions

Two concentric circles form a ring The inner and outer circumference of the ring are 352 7 m and 528...........

Quantitative Aptitude ( CCS) Mensuration 2D
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    Two concentric circles form a ring. The inner and outer circumference of the ring are 352/7 m and 528/7m respectively.Find the width of the ring.

    1 m

    Incorrect Answer

    2 m

    Incorrect Answer

    3 m

    Incorrect Answer

    4 m

    Correct Answer
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    Explanation:

    let the inner and outer radii be r and R meters
    then, 2πr = 352/7
    => r = (352/7) * (7/22) * (1/2) = 8m
    2πR = 528/7
    => R= (528/7) * (7/22) * (1/2)= 12m
    width of the ring = R-r = 12-8 = 4m

    By: MIRZA SADDAM HUSSAIN
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