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1km = 100000cm 30km x 100000cm/km = 3000000cm
8 cm in km would be 0.00008km
30000 m
To find out how many kilometers 0.5 cm represents on the map, you can set up a proportion. Since 2 cm represents 50 km, you can write the proportion as 2 cm is to 50 km as 0.5 cm is to x km. Cross multiplying, you get 2 * x = 0.5 * 50. Solving for x, you find that 0.5 cm on the map represents 12.5 kilometers.
1 centimeter = 1.0 × 10-5 kilometers, or 0.00001 kilometers.