A 25-cm-diameter, 2.4-m-long vertical cylinder containing ice at 0ºC is buried right under the ground. The cylinder is thin-shelled and is made of a high thermal conductivity material. The surface temperature and the thermal conductivity of the ground are 18ºC and 0.85 W/m•ºC, respectively. The rate of heat transfer to the cylinder is
(a) 37.2 W
(b) 63.2 W
(c) 158 W
(d) 480 W
(e) 1210 W
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