Answer:
the ratio for this blueprint is 1:20
Step-by-step explanation:
The scale on a blueprint indicates that ½ " equals 10 feet
The ratio is in the form of a:b
Here from the given information
the value of 'a' is 1/2 and the value of b is 10
so the ratio a:b becomes
[tex]\frac{1}{2} : 10[/tex]
Multiply both sides of the ratio by 2 to remove fraction
[tex]1:20[/tex]
so the ratio for this blueprint is 1:20