Предмет: Математика, автор: 3ve3d87

Помогите решить, заранее спасибо)

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Автор ответа: Лёха3111

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1 рисунок - 5 ч 40 мин
2 рисунок - 6 ч 20 мин
3 рисунок - 6 ч 45 мин

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