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      Question

      Assume that ‘u’ is directly proportional to ‘v’.

      If u = 63 when v = 21, then determine the value of ‘u’ when v = 35.
      A 132 Correct Answer Incorrect Answer
      B 240 Correct Answer Incorrect Answer
      C 105 Correct Answer Incorrect Answer
      D 172 Correct Answer Incorrect Answer

      Solution

      ATQ,

      u ∝ v

      So, Let, u = k × v (where, ‘k’ is a proportionality constant)

      ATQ,

      63 = k × 21

      So, k = (63 / 21) = 3

      So, when ‘v’ = 35, then,

      u = 3 × 35 = 105

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