Two cubes with sides of length 168.4 mm fit in a space that is 337.8 mm wide, as shown in the figure. One cube is made of aluminum, and the other is made of brass. What temperature increase is required for the cubes to completely fill the gap? (The linear expansion coefficients for aluminum and brass are 2.20 10-5 K?1 and 1.90 10-5 K?1, respectively.)