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blurryface2
@blurryface2
August 2022
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alika75nata
Решение
х км/ч-скорость ветра
2 мин=2/60ч=1/30 ч
20 сек=20/3600с=1/180ч
(460-х) /180=(30+х) /30
460-х=180+6х
7х=280
х=40 км/ч
1 votes
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Answers & Comments
х км/ч-скорость ветра
2 мин=2/60ч=1/30 ч
20 сек=20/3600с=1/180ч
(460-х) /180=(30+х) /30
460-х=180+6х
7х=280
х=40 км/ч