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      Question

      'x' varies directly as per 'y' and 'z'. When 'y' = 6 and

      'z' = 8, then x = 16. Find the value of 'z', when 'y' = 8 and x = 24.
      A 18 Correct Answer Incorrect Answer
      B 12 Correct Answer Incorrect Answer
      C 6 Correct Answer Incorrect Answer
      D 9 Correct Answer Incorrect Answer

      Solution

      Let x = kyz, where 'k' is some constant.

      ATQ;

      16 = k X 6 X 8

      Or, k = (1/3)

      So, required value = 24 = (1/3) X z X 8

      Or, z = 9

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