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Mathematics, 06.10.2021 17:20 delanieloya

Первая труба наполняет бассейн за 10 часов, а вторая труба за 12 часов. Какая часть бассейна останется не наполненной после 4 часов совместной работы двух труб?

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Первая труба наполняет бассейн за 10 часов, а вторая труба за 12 часов. Какая часть бассейна останет...
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