Предмет: Математика, автор: sayonaragirl1433

помогите
даю 35 баллов​

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Автор ответа: NastyashaA25
1

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в первой задаче 78 вопросов

во второй задаче 80км

через пропорцию

sayonaragirl1433: спасибо
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Ответы можно на русском языке. Заранее спасибо, кто поможет хотя бы с 1 вопросом
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