Answer:
yes, you can just write it as 3m : 2km
Explanation:
I don't know if this is completely right, but I know you can also turn 3m into km by multiplying it by 1000, (because there are 1000 m in every km) and then solve because 3000km/2km = 1500km
So to solve would be 1500 km. I hope the first answer is right though. Did I help? Let me know in the comments