Question 3:   A house has a composite wall of wood, fiberglass insulation, and plaster board, as indicated in the sketch. On a cold winter day the convection heat transfer  coefficients are ho  60 W/m2  K and hi  30 W/m2  K. The total wall surface area is 350 m2.  (a)Determine the total heat loss through the wall.          (b) If the wind were blowing violently, raising ho to 300 W/m2  K, determine the percentage increase in the heat loss.

I need help on 2b

Please show all step, not Ai generated.

An uninsulated steam pipe passes through a room in which the air and walls are at 25°C. The outside diameter of the pipe is 88 mm, and its surface temperature and emissivity are 200°C and 0.80 respectively. If the coefficient associated with free convection heat transfer from the surface to the air is 15W/m2-k, what is the rate of heat loss for a 5 meter pipe?   Round your answer to 2 decimal places.