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      Question

      The volume of a cube is 27 cm³. If the cost of painting

      the cube is Rs. 25 per cm², then find the cost of painting five faces of the cube.
      A Rs. 1,100 Correct Answer Incorrect Answer
      B Rs. 950 Correct Answer Incorrect Answer
      C Rs. 1,200 Correct Answer Incorrect Answer
      D Rs. 1,125 Correct Answer Incorrect Answer

      Solution

      Let the length of the edge of the cube be ‘x’ cm.
      Volume of cube = x³
      ATQ;
      27 = x³
      Or, x = 3
      Area of five faces of the cube = 5x² = 5 × 3 × 3 = 45 cm²
      Required cost = 45 × 25 = Rs. 1,125

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