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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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