Предмет: Математика, автор: SVETA12lana

помогите решить задачу

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Автор ответа: АринаБукша

0

Лодка плыла 2 часа!Так ка 20 км она плыла по собственной скорости и 4 км по скорости реки.Так как она пошла обратно ,значит еще час.Проплыла 48 км за 2 часа

Автор ответа: murkins

0

1)Таблица и вычисления на фото.
Чтобы на скорость по течению надо скорость собственную сложить со скоростью реки, чтобы найти скорость против течения, наоборот, от собственной скорости отнять скорость течения реки. И тд

2) S = 48км Vсоб= 20 Vреки = 4
Туда она шла 24км и обратно 24км (весь путь разделили на 2)
Скорость по течению 20+4 = 24
Против течения 20-4 = 16
Время пока шла по течению 24:24 = 1 час
Против течения 24:16 = 3/2 или 1,5 часа
Всего времени 1 + 1,5 = 2,5 часа

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2. Who, according to Jane, should be given 'the book about a liar' and why?
3. In lines 24-30 Jane states her intentions for the future. How does she plan to punish Mrs Reed for her crueity?
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5. How does Mrs Reed react to what Jane says?

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