February 2019 1 23 Report
Rina ingin mandi dengan air hangat.Ia mencampur air panas bersuhu 95°C dengan air dingin bersuhu 30°C. Air dingin yang digunakan sebanyak 4 kg. Kalor jenis air dingin dan air panas diasumsikan sama. Jika suhu campuran 55°C,massa air sebanyak....kg
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