SOLUTION
In a scale model of television, 1cm = 10 inches
[tex]1cm\colon10\text{inches}[/tex]
(a) The length of real TV = 80 inches, then the length of the TV in scale model:
[tex]\begin{gathered} 1cm\colon10\text{inches} \\ x\colon80\text{inches} \\ x=\frac{80}{10}cm \\ x=8cm \end{gathered}[/tex]
Hence the length of the TV in scale model = 8cm
(b) In the scale model, the height of the TV =5cm, the height of the real TV will be:
[tex]\begin{gathered} 1cm\colon10\text{inches} \\ 5cm\colon x \\ x=5(10)in\text{ches} \\ x=50\text{inches} \end{gathered}[/tex]
Hence the height of the real TV = 50inches
