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Ульяна122004
28.02.2021 10:50

Расстояние от Емелиной избы до леса сани проходят сами за 20 мин, двигаясь со скоростью 75 м/мин. Это же расстояние сани с хворостом

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Ответ:
lotostp
17.04.2019 06:40
1)  20 * 75 = 1 500 (м) - проходят сани за 20мин
2)  1 500 : 30 = 50 (м/мин) - скорость с хворостом
Ответ: 50 м/мин.
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