Subject

    Quantitative Aptitude

    Topic

    Areas & Volumes

    The length of a rope in meter by which a cow must be tethered in order that she may be able to graze an area of 2826 sq.m is ?

    ক)
    15 mts
    খ)
    30 mts
    গ)
    24 mts
    ঘ)
    36 mts

    Explanation

    The cow can graze an area of 2826 sq.m i.e it is able to cover area of circle of 2826 sq.m Therefore , πr2\mathrm{πr}^2 =2826 r2r^2 =(2826×7/22) = 899.18 = 900 r = 30 m. Therefore, the radius of the circle implies the length of the rope = 30 mts

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