Answer:

12 km

Step-by-step explanation:

6 km per hour/1hour

It means you need to multiply it by 2.

So when you multiply it by 2 the answer will be 12 km which is the answer.

I don't know if you understand my explanation but it's the correct answer.

Hope it helps.

#CarryOnLearning

Answer:

12hours is the answer

Step-by-step explanation:

6x2=12