New Enroll in RBI Grade B New Batch - Starts on May 21

    Question

    If the edge of the cube is increased by 30%, then find the

    percentage increase in the volume of the cube.
    A 130% Correct Answer Incorrect Answer
    B 117% Correct Answer Incorrect Answer
    C 119.7% Correct Answer Incorrect Answer
    D 110% Correct Answer Incorrect Answer

    Solution

    Let the edge of the cube be x unit
    Volume of cube = x³ cubic unit
    New edge = 1.3x unit
    New volume = (1.3x)³ = 2.197x³ cubic unit
    Increase in volume = 2.197x³ – x³ = 1.197x³ cubic unit
    Percentage increase = (1.197x³ / x³) × 100 = 119.7%

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