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      Question

      The volume of a solid cube is 1331 m3. If

      whole cube is to be painted at a rate of Rs. 10 per m2, then what will be the cost of painting the cube?
      A Rs. 7060 Correct Answer Incorrect Answer
      B Rs. 7230 Correct Answer Incorrect Answer
      C Rs. 7260 Correct Answer Incorrect Answer
      D Rs. 7270 Correct Answer Incorrect Answer
      E None of these Correct Answer Incorrect Answer

      Solution

      Let the edge length of the cube = ‘a’ metres Then, volume of the cube = a3 = 1331 So, a = 1331(1/3) = 11 So, total surface area of the cube = 6a2 = 6 × 112 = 726 m2 So, cost of painting the cube = 726 × 10 = Rs. 7260

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