October 2021 1 9 Report
Смешали 6 кг воды при 42 °С, 4 кг воды при 72 °С и 20 кг воды при неизвестной температуре. Определите эту температуру, если установившаяся температура равна 30 °С.

Ответ:
26 ºC

38 ºC

25 ºC

18 ºC
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