Предмет: Математика, автор: amirzhanbakytbek

Кран А может наполнить бассейн за 2 часа , кран Б за 4 часа. Кран А открыли на 15 минут, за какое время кран Б наполнить оставшуюся часть бассейна?
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Ответы

Автор ответа: Yulia12345678902
11

Ответ:

3,5 часа или 3 часа 30 минут

Пошаговое объяснение:

первый кран, проработав 15 минут заполнил часть бассейна, равную

15мин/120мин = 0,125 всего объема бассейна

осталось наполнить 1-0,125 = 0,875 части бассейна

второй кран, который наполнит весь бассейн за 4 часа, наполнит 0,875 чать бассейна за: 4часа*60 (перевод в минуты)*0,875

240*0,875 = 210мин = 3,5 часа или 3 часа 30мин

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