Physics - Heat & Thermo Question with Solution | TestHub

Heat lost = heat gained: $200\left(80-T\right)=300\left(T-20\right)$, so $T=\frac{16000+6000}{500}={44.0}^{\circ }$C. The heat is conserved but the temperature is not: the initial temperatures $80$ and $20$ become $44.0$ for both.