SOLUTION: The scale on a map is 2 cm: 21 Km . Find the actual distance for the following map distances. 1. 9 cm 2. 12.5 3. 14 mm 4. 3.6 m 5. 4.5 cm 6. 7.1

Algebra ->  Customizable Word Problem Solvers  -> Travel -> SOLUTION: The scale on a map is 2 cm: 21 Km . Find the actual distance for the following map distances. 1. 9 cm 2. 12.5 3. 14 mm 4. 3.6 m 5. 4.5 cm 6. 7.1       Log On

Ad: Over 600 Algebra Word Problems at edhelper.com


    

Question 594118: The scale on a map is 2 cm: 21 Km . Find the actual distance for the following map distances.
1. 9 cm
2. 12.5
3. 14 mm
4. 3.6 m
5. 4.5 cm
6. 7.1
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
I'll do the first one to get you started

# 1

2/21 = 9/x

2x = 21*9

2x = 189

x = 189/2

x = 94.5


So the actual distance that 9 cm represents is 94.5 km