\[ \frac{p_1V_1}{T_1} = const \]
\[ \frac{p_2V_2}{T_2} = const \]
\[ \frac{p_1V_1}{T_1} = \frac{p_2V_2}{T_2} \]
\[ p_2 = \frac{p_1V_1T_2}{V_2T_1} = \frac{1.0 \cdot 10^5 \cdot 4 \cdot 600}{2 \cdot 300} = \frac{4 \cdot 600 \cdot 10^5}{600} = 4 \cdot 10^5 \]
Ответ: 4