A pipe has a surface temperature of 70ºC and having diameter and length of 10 cm and 8 m respectively. The pipe is placed in a room having a temperature of 20º C. Thermophysical properties at mean temperature, the thermal conductivity is 0.02699 W/m K and kinematic viscosity is 1.749 *  10^-5 m²/s and Prandtl number is 0.7241. Calculate heat loss from pipe considering natural convection in KW. Nu= 0.54 Ra^1/4.(Round off to one decimal place)