1.

3a+5b /3a-5b =5 than a:b

Answer»
\frac{3a + 5b}{3a - 5b} = 5


By COMPONENDO and DIVIDENDO, we GET


\frac{3a + 5b + 3a - 5b}{3a + 5b - 3a + 5b} = \frac{5 + 1}{5 - 1} \\ \\ \\ => \frac{6a}{10b} = \frac{6}{4} \\ \\ => \frac{a}{b} = \frac{6 \times 10}{4 \times 6} \\ \\ = > \frac{a}{b} = \frac{10}{4} \\ \\ => \frac{a}{b} = \frac{5}{2}


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