A steel tube (k = 15 W/m.K) with 5 cm inner diameter and 7.6 cm outer diameter is covered with an insulation (k = 0.2 W/m.K), 0.2 cm thick. A hot gas at 330°C flows through tube with hi = 400 W/m 2...

A steel tube (k = 15 W/m.K) with 5 cm inner diameter and 7.6 cm outer diameter is covered with an insulation (k = 0.2 W/m.K), 0.2 cm thick. A hot gas at 330°C flows through tube with hi = 400 W/m².K. The outer surface of the insulation is exposed to air at 30°C with ho = 60 W/m².K. Calculate (a) the rate of heat loss from 10 m long tube, (b) temperature drop resulting from each of thermal resistances