An aluminum rod is 10 centimeter long and a steel rod is 50 centimeter long when both rods are at a temperature of 15°C. Both rods have the similar diameter. The rods are joined end-to-end to form a rod 60 centimeter long. The coefficients of linear expansion of aluminum and steel are 2.4 x 10-5 K-1 and 1.2 x 10-5 K-1, correspondingly. The temperature is raised to 90°C. Find the increase in the length of the joined rod?