60°C temperaturadagi 280 g toyingan eritma 20°C gacha sovutilganda hos




54. (v15-108-21) 60°C temperaturadagi 280 g toyingan eritma 20°C gacha sovutilganda hosil bolgan chokmaning massasini (g) aniqiang. (S(20°C)tuz = 20 g, S(60°C)tuz = 50 g) A)30 B)56 C)27 D)48

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