13. On weekends, as part of his exercise routine, Carl goes for a run, partly C on paved trails and partly across rough terrain. He ru

Question

13. On weekends, as part of his exercise routine, Carl goes for a run, partly
C on paved trails and partly across rough terrain. He runs at 10 km/h on
the trails, but his speed is reduced to 5 km/h on the rough terrain. One
day, he ran 12 km in 1.5 h. How far did he run on the rough terrain?

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Ngọc Diệp 2 months 2021-07-26T13:04:44+00:00 1 Answers 3 views 0

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    2021-07-26T13:06:12+00:00

    Answer:

    5*a+10*b=12,

    a+b=1.5

    Step-by-step explanation:

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