Find the rate of heat transfer from a 3-in.-OD pipe placed eccentrically inside a 6-in.-ID cylinder with the axis of the smaller pipe displaced 1 in. from the axis of the large cylinder. The space between the cylindrical surfaces is filled with rock wool (k = 0.023 Btu/h ft °F). The surface temperatures at the inside and outside surfaces are 400°F and 100°F, respectively.