Subject

    Quantitative Aptitude

    Topic

    Mensuration

    Find out the ratio of the volume of a cube and volume of a ball, if the ball fits exactly inside the cube

    ক)
    2 : π
    খ)
    π : 6
    গ)
    6 : π
    ঘ)
    8 : π
    ঙ)
    9 : π

    Explanation

    Let the edge of the cube and radius of the ball be x units and r units respectively As we know, the ball fits exactly inside the cube ∴ Diameter of the ball = Edge of the cube ⇒ 2r = x Now, Volume of cube = (edge) 3 = x 3 = 8r 3 volume of ball = 4/3 × π r 3 ⇒ Required ratio =8r343πr3=6π= \frac{{8{r^3}}}{{\frac{4}{3}\pi {r^3}}} = \frac{6}{\pi } ⇒ Required ratio = 6 : π Hence, the ratio of volumes of the cube and that of the ball is 6 : π

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