Question

On a map, the length of a nature-center trail is 10.8 centimeters. If the scale is 3 centimeters to 20 kilometers, what is the actual length of the trail.

Answer 1

3 cm ---> 20 km
1 cm ---> 20/3 km
10.8 cm --- (20/3)(10.8) km = .....

Answer 2

i don't understand your answer to my ?

Answer 3

my last line ....
10.8 cm = (20/3)(10.8) = 72 km

or

set up a ratio:

L/10.8 = 20/3
L = 10.8(20/3) = 72