TWO_RODS_A_AND_B_OF_THE_SAME_LENGTH_AND_DIAMETER_PROTRUDE_FROM_A_SURFACE_AT_120_DEGREE_CELSIUS_AND_ARE_EXPOSED_AT_AIR_AT_25_DEGREE_CELSIUS._THE_TEMPERATURES_MEASURED_AT_THE_END_OF_THE_RODS_ARE_50_DEGREE_CELSIUS_AND_75_DEGREE_CELSIUS._IF_THERMAL_CONDUCTIVITY_OF_MATERIAL_A_IS_20W/_M_K,_CALCULATE_IT_FOR_B?$

• A. 31.13W/m K
• B. 41.13W/m K
• C. 51.13W/m K
• D. 61.13W/m K