In an annealing (heat treatment) process, copper rods ( = 8933 kg/m3 , k = 401 W/m ∙ K, c = 385 /kg ∙ K, = 1.17 × 10−5m2 /s) with a radius of 0.05 meters are treated by drawing them through an industrial high temperature furnace. The gases ( = 0.4213 kg/m3 , k = 0.08491 W/m ∙ K, c = 1292 /kg ∙ K, = 1.56 × 10−4m2 /s) in the furnace are maintained at 1300K. The heat transfer coefficient in the furnace is 150W/m2 ∙ K. The copper rods enter the furnace at a uniform temperature of 350K throughout the rods.

You have two photos of a person walking. one shows the person at the corner of third and main streets, the other shows the person at the corner of tenth and main streets. there are lampposts at every corner in this town, and the first picture shows it to be 10: 32: 00 exactly. the second picture shows it to be 10: 49: 30. you know three facts: (1) all of the clocks are synchronized; (2) there are exactly 12 equal-sized blocks per kilometer in this town; and (3) the streets that cross main in this area are numbered consecutively, with no interruptions. what is the person’s average speed in kilometers per hour?