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  3. huong travelled to the lake and back it took 3...

Question: huong travelled to the lake and back it took 3...

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Huong travelled to the lake and back. It took 3 hours longer to go there than it did to come back. The average speed on the trip there was 32km/h. The average speed on the way back was 80km/h. The average speed on the way back was 80km/h. How many hours did the trip there take?

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