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      Question

      The product of two positive numbers is 720. If one of the

      numbers is four times the other, then find the difference between the given two numbers.
      A 40.2 Correct Answer Incorrect Answer
      B 52.5 Correct Answer Incorrect Answer
      C 62.2 Correct Answer Incorrect Answer
      D 78.5 Correct Answer Incorrect Answer

      Solution

      ATQ,

      Let us assume one of the numbers is 'x'

      Then, another number is = 4 × x = '4x'

      So, x × 4x = 720

      Or, 4x² = 720

      Or, x² = 180

      Or, x = 13.4 {Since the numbers are positive}

      Required difference = {4 × (13.4) - 13.4} = (53.6 - 13.4) = 40.2

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