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    Question

    If the total surface area of a cube is 486 cm², then

    calculate the volume of the cube.
    A 545 cm³ Correct Answer Incorrect Answer
    B 690 cm³ Correct Answer Incorrect Answer
    C 729 cm³ Correct Answer Incorrect Answer
    D 840 cm³ Correct Answer Incorrect Answer

    Solution

    Let the length of each edge of the cube = ‘a’ cm ATQ; 486 = 6a² Or, a² = 81 So, a = 9 [Since, length cannot be negative] Volume of cube = a³ = 9³ = 729 cm³

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