Respuesta :

Answer:

Step-by-step explanation:

3,000,000 cm = 30,000 m  = 30 km.

There are 100 cm in a meter and 1000 m in a km,

Answer:

3000 000cm= 30000m= 30km

Step-by-step explanation:

100cm = 1m

divide it by hundred

3000000 = 30000m

divide it by thousand

1000m = 1km

300 00m = 30km