Part 1)
we have
the scale is [tex]1:100,000[/tex]
the distance on a map is [tex]12\ cm[/tex]
we know that
The scale is equal to the distance on a map divided by the real distance
Let
x------> distance on a map
y-------> real distance
S-------> scale
[tex]S=\frac{x}{y}[/tex]
In this part we have
[tex]S=\frac{1}{100,000}[/tex]
[tex]x=12\ cm[/tex]
Find the value of y
[tex]y=\frac{x}{S}[/tex]
Substitute the values
[tex]y=\frac{12}{(1/100,000)}[/tex]
[tex]y=1,200,000\ cm[/tex]
Convert to kilometers
[tex]y=12\ Km[/tex]
Part 2)
In this part we have
[tex]S=\frac{1}{300,000}[/tex]
[tex]y=12\ km[/tex]
Find the value of x
[tex]x=S*y[/tex]
Substitute the values
[tex]x=(1/300,000)*12[/tex]
[tex]x=0.00004 Km[/tex]
Convert to centimeters
[tex]x=4\ cm[/tex]
therefore
the answer is
The distance is [tex]4\ cm[/tex]
