Subject

    Quantitative Aptitude

    Topic

    Mensuration

    If the area of a rhombus is 54 sq.cm and the length of one of the diagonals is 6 cm then the length of the other diagonal is -

    ক)
    18 cm
    খ)
    12 cm
    গ)
    9 cm
    ঘ)
    6 cm

    Explanation

    Area of  rhombus = 12×d1×d2{1 \over 2} \times {d_1} \times {d_2} Where d­ 1 and d 2 are the diagonals of the rhombus, \eqalign{ & \Rightarrow 54\ {cm^2} = {1 \over 2}{d_1} \times {d_2} \cr & \Rightarrow {d_2} = 18\ cm \cr} Hence, length of the second diagonal would be 18 cm.

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