Dog II

Journey from a rangers' home to the town is 6 km. Mr. ranger started from his home and went 3 km per hour. His women came from the town and also went 3 km per hour. With ranger started dog and runs in 12 km in 1 hour. The dog went to ranger's women then back to ranger and running from one to the one until the two meet.

How many miles will pass a dog?

Result

x =  12 km

Solution:

Solution in text x =

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