Through a $1m$ long steel pipe $)=(15\frac{W}{m}C$ with an inner diameter of $5cm$ and an outer diameter of $5\mathrm{.}5cm320C$ steam passes through. Since the outdoor temperature is $5C,$ in order to prevent heat loss The outside of the pipe is covered with $3cm$ thick glass wool $($kelasswool $=0\mathrm{.}038\frac{W}{m}C)$

along the pipe Determine the rate of heat transfer that occurs.

$)=80\frac{W}{m_2}C,h_2=(15\frac{W}{m_2}C$