Предмет: Математика, автор: lyuba555

1час это 3600 сек.
3600х20=7200 м.
1 км=1000 м.
7200 м=72 км

Ответы

Автор ответа: julyap

0

1 ч = 3600 с.
3600*20=72000м
1 км=1000 м.
72000 м/1000=72 км

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