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      Question

      If V and S denote the volume and the total surface area

      of a cuboid (of sides a, b and c) respectively, then which of the following is true?
      A (1/V) = (2/S) (1/a + 1/b + 1/c) Correct Answer Incorrect Answer
      B (1/V) = (1/S) (2 + 1/b + 1/c) Correct Answer Incorrect Answer
      C 0 = (2/S) (1/a + 1/b + 1/c) Correct Answer Incorrect Answer
      D (1/V) = (2/S) (1/a – 1/b – 1/c) Correct Answer Incorrect Answer

      Solution

      The correct answer is A

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