Using unitary method, the actual distance between the two towns is 105 km.
The formula of the unitary method is to find the value of a single unit and then multiply the value of a single unit to the number of units to get the necessary value.
1 cm = 30 km
3.5 cm = 30 * 3.5 = 105 km
Learn more about unitary method here
https://brainly.com/question/22056199
#SPJ2