D=8 cm diameter semi-worm aluminum cylinder (k=237 W/m C, a=9.7110-5 m2 /s) uniform initial temperature is 115C. The cylinder is then h=140 W/m2 C It transfers heat by convection with a heat transfer coefficient of 10C to water at a temperature of 10C. has been set. 5 cm from the end surface 8 minutes after the start of cooling Find the temperature of the center of the cylinder.