Answer:
5 in.
Step-by-step explanation:
The ratio of map distance to real distance is 1 in : 3 km meaning that 1 inch on the map describes 15 km in real life.
15 km is 5 times 3 km, so the map distance is 5 times 1 in., or 5 in.
1 in. x 5 : 3 km x 5
This is a "school math" problem where things come out nicely! Another way to look at this is with equivalent fractions.
[tex]\frac{\text{1 in}}{\text{5 km}} = \frac{\text{m}}{\text{15 km}}[/tex]
"cross multiply"
[tex]5m = (15)(1)\\5m=15\\m=3 \text{ in.}[/tex]
