use the given scale factor in the Silence of the scale drawing to determine the side length of the real object

The length of a, b, c can be found below
[tex]\begin{gathered} 4\colon1 \\ a=\frac{10}{4}=2.5 \end{gathered}[/tex][tex]b=\frac{10}{4}=2.5[/tex][tex]c=\frac{12}{4}=3[/tex]