AP EAMCET Engineering 20 Apr 2019 Shift 1 Paper

A metal rod of length 10 cm and area of cross section 2.8 × 10−4m2 is covered with a non - conducting substance. One end of it is maintained at 80 °C. while the other end is put in ice at 0 °C. It is found that 20 g of ice melts in 5 min. The thermal conductivity of the metal in Js−1m−1K−1 is
(Latent heat of ice is 80 cal s−1)