Solution.
"Q1(H2O) = Q2(H2O)"
"c \\times m1 \\times (T1-T2) = c \\times m2 \\times (T2-T1)"
"0.2 \\times (59-x) = 0.4 \\times (x-20)"
x = 33
Answer:
T2 = 33 Celsius degree
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