Solve this map scale problem
The scale on a map is 1 cm = 10 miles. Find the length on the map of 300 miles
Setup Scale
Our scale is 1 cm to 10 miles
Find how many cm exist in 300 miles
Set the missing cm measurement as x:
| 1 cm | |
| 10 miles |
| = |
| x |
| 300 miles |
Cross-Multiply:
10 miles(x) = 1 cm * 300 miles
Divide each side of the equation by 10 miles to isolate x:
| 10 miles(x) | |
| 10 miles |
| = |
| 1 cm * 300 miles |
| 10 miles |
Cancel the miles measurement on the right side and simplify:
| x = | 1 cm * 300 |
| 10 |
| x = | 300 cm |
| 10 |
x = 30 cm
