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      Question

      The volume of a cube is 1331 cm³. If the cost of painting

      the cube is Rs. 7 per cm², then find the cost of painting five faces of the cube.
      A Rs. 3,432 Correct Answer Incorrect Answer
      B Rs. 3,250 Correct Answer Incorrect Answer
      C Rs. 3,400 Correct Answer Incorrect Answer
      D Rs. 3,185 Correct Answer Incorrect Answer
      E Rs. 4,235 Correct Answer Incorrect Answer

      Solution

      Let the length of the edge of the cube be ‘x’ cm.
      Volume of cube = x³
      ATQ;
      1331 = x³
      Or, x = 11
      Area of five faces of the cube = 5x² = 5 × 11 × 11 = 605 cm²
      Required cost = 605 × 7 = Rs. 4,235

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