Subject

    Quantitative Aptitude

    Topic

    Areas & Volumes

    The inner circumference of a circular race track, 14 m wide, is 440 m. Find radius of the outer circle

    ক)
    44
    খ)
    22
    গ)
    33
    ঘ)
    84

    Explanation

    Let inner radius be r metres. Then, 2π\mathrm\pir = 440 ; r = 440×744440\times\frac7{44} = 70 m. Radius of outer circle = (70 + 14) m = 84 m

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