Subject

    Quantitative Aptitude

    Topic

    Percentage

    Each edge of a cube is increased by 20% then the percentage increase in surface area of the cube is :

    ক)
    144%
    খ)
    40%
    গ)
    44%
    ঘ)
    72.8%

    Explanation

    The surface area of a cube = 6a2a^2 =  6side2side^2 New  Surface area = 6 x 1.44a2a^2 Therefore, 0.44a2a2×100\frac{0.44a^2}{a^2}\times100 = 44%

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