Question

27. If y : 18 = 8 : y, calculate the positive value of y.

Answer 1

$\begin{gathered} = > \frac{y}{18} = \frac{8}{y } \\ by \: cross \: multiplication \\ = > {y}^{2} = 18 \times 8 \\ = > {y}^{2} = 144 \\ = > y = \sqrt{144} \\ = > y = 12\end{gathered}$