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7200 J = 0,2 kg. 2400 j/kg°c. (T₂-T₁)
7200 = 480 j/°c . (T₂ - 24°c)
15°c = T₂ - 24°c
T₂ = 15°c + 24°c
= 39°c
itu jawabannya mungkin, hehe :)