Estimate the energy loss from the pipe per meter of length.

A 50cm diameter pipeline in the Arctic carries hot oil at 30°C and is exposed to a surrounding temperature of -20°c. A special powder insulation 5cm thick surrounds the pipe and has a thermal conductivity of 7 mW/m.⁰C. The convection heat-transfer coefficient on the outside of the pipe is 9W/m².⁰C, Estimate the energy loss from the pipe per meter of length.