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    A cube is painted on all faces and then cut into 27 smaller cubes of equal sizes. How many smaller cubes have exactly two faces painted ?
    Question

    A cube is painted on all faces and then cut into 27 smaller cubes of equal sizes. How many smaller cubes have exactly two faces painted ?

    A.

    14

    B.

    18

    C.

    12

    D.

    9

    Correct option is C

    Given:
    A large painted cube is cut into 27 smaller cubes.
    Formula Used:
    Total number of cubes =n3 n^3​​
    Number of cubes with exactly two faces painted = 12 × (n - 2)
    Solution:
    First, determine the value of n by using the total number of smaller cubes.
    n3=27n^3 = 27​​
    n=273=3n = \sqrt[3]{27} = 3​​
    Cubes with exactly two faces painted are located on the edges of the original large cube, excluding the corners.
    Number of cubes with exactly two faces painted = 12 × (3 - 2)
    Number of cubes = 12 × 1 = 12
    Final Answer
    So the correct answer is (c)

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