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If the side of a cube …

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If the side of a cube is increased by 50percent.What is the percentage increase in its surface area

    • Posted by Amin Gupta 9 years, 3 months ago

    CBSE > Class 09 > Other Subjects
    • 1 answers

    Rashmi Bajpayee 9 years, 3 months ago

    Let side of a cube be a, then surface area of cube = 6a2

    Now, new side of cube = a + 50% of a = 1.5a

    New Surface area = 6 x (1.5a)2 = 13.5a2

    Increase in Surface area = 13.5a2 - 6a2 = 7.5a2

    Percentage Increase in Surface area = 7.5a2/6a2 x 100 = 125%

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