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58. Three rods AB, BC and BD of same len...

58. Three rods AB, BC and BD of same length / and cross-sectional area A are arranged as shown. The end D is immersed in ice whose mass is 440 g and is at 0°C. The end C is maintained at 100°C. Heat is upplied at constant rate of 200 cal/s. Thermal conductivities of AB, BC and BD are K 2K and K2, respectively. Time after which whole ice will melt is (K = 100 cal/m-s-°C, A = 10 cm. 7 = 1 m) (6) 10.344 (c) 10.34 (d) 8.76 cm 61. The earth re the sun at th the centre of is 1.5 x 10" 10 m. Trea from the abc

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