\(\mathrm{m}_1  =\sigma \times 5=10 \mathrm{Kg} \quad \mathrm{m}_2=\sigma \times 1=2 \mathrm{Kg}\)

(Image)

\(\mathrm{m}_3=\sigma \times 6=12 \mathrm{Kg}\)

\(\Rightarrow \mathrm{m}_1 \mathrm{x}_1+\mathrm{m}_2 \mathrm{x}_2=\mathrm{m}_3 \mathrm{x}_3\)

\(10 \mathrm{x}_1+2(1.5)=12(1.5) \Rightarrow \mathrm{x}_1=1.5 \mathrm{~cm}\)

\(\Rightarrow \mathrm{m}_1 \mathrm{y}_1+\mathrm{m}_2 \mathrm{y}_2=\mathrm{m}_3 \mathrm{y}_3\)

\(10 \mathrm{y}_1+2(1.5)=12 \times 1 \Rightarrow \mathrm{y}_1=0.9 \mathrm{~cm}\)

\(\frac{\mathrm{x}_1}{\mathrm{y}_1}=\frac{1.5}{0.9}=\frac{15}{9}\)

\(\mathrm{n}=15\)