Dirty road

Mr. Smith is on a road trip to a remote disc golf course 180km away. He travels part of the way at 100km/h along the highway, and part of the way at 50km/h along dirt roads. If it took 2 hours to get there, how many hours did he spend on dirt roads?

Result

d =  20 km

Solution:

Solution in text d =







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To solve this verbal math problem are needed these knowledge from mathematics:

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