Answer:
40 km
Step-by-step explanation:
We can use a ratio to solve
1 cm 8 cm
-------- = ----------
5 km x km
Using cross products
1 * x = 5 * 8
x = 40
40 km
[tex]\bf \large{\pink{ \implies}} \tt \: \frac{1 \: cm}{5 \: km} \: = \: \frac{8 \: cm}{x} \: \: \: \rm{\red{ (cross \: \: multiplying)}}[/tex]
[tex]\bf \large{\pink{ \implies}} \tt \:x \: = \: 40[/tex]
