1200:4=300 км
300:80=3.75 ч
1200-300=900 км
900:120=7.5 ч
3.75+7.5=11.25 ч
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1200:4=300 км
300:80=3.75 ч
1200-300=900 км
900:120=7.5 ч
3.75+7.5=11.25 ч