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    • Question

      A quantity p is directly proportional to quantity q.

      When p = 63, then q = 21. When q = 35, then find the value of p.
      A 80 Correct Answer Incorrect Answer
      B 105 Correct Answer Incorrect Answer
      C 100 Correct Answer Incorrect Answer
      D 120 Correct Answer Incorrect Answer

      Solution

      p ∝ q, which means, when 'p' increases then 'q' will also increase and when 'p' decreases then 'q' will also decrease. So, Let, p = k X q (where, 'k' is a proportionality constant) ATQ,
      63 = k X 21 So, k = (63/21) = 3 When 'q' = 35, then,
      p = 3 X 35 = 105

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