Ratio

Ratio

TGM Original Questions
  1. If \(a : b = 2 : 3\) and \(b : c = 7 : 9\), find
    1. \(a : b : c\),
    2. \(a : c\),
    3. \(\frac{4a + 5b}{2a - 14c}\),
    4. \(\frac{a^{2}}{5ab + 14bc}\).
  2. If \(x : y = 8\% : 5\%\) and \(z : y = 2 : 15\), find
    1. \(x : y : z\),
    2. \(x : z\),
    3. \(\frac{y}{x + y + z}\),
    4. \(\frac{3xz}{y^{2} + 2xy + x^{2}}\).

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Answer:(i)(a) \(14:21:27\) (i)(b) \(14:27\) (i)(c) \(-\frac{23}{50}\) (i)(d) \(\frac{1}{48}\) (ii)(a) \(24:15:2\) (ii)(b) \(12:1\) (ii)(c) \(\frac{15}{41}\) (ii)(d) \(\frac{16}{169}\)

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