2 Fast 2 Curious

Algebra Level pending

A red car and a blue car started racing towards each other at the same time from point $$A$$ and $$B$$ respectively, as shown above, where $$AB$$ was $$600$$ km. long.

Then $$6$$ hours later, both cars met up at point $$C$$ with constant speeds.

Afterwards, when the blue car reached the destination at point $$A$$, the red car was passing point $$D$$.

If $$CD$$ was $$160$$ km. long, how many more hours would the red car take to travel from point $$D$$ to the destination $$B$$?

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