A thin$-$walled circular pipe is $1000$ m long and $\mathrm{.}14$ m in diameter. The pipe is buried under ground where the soil temperature is $35$ C$.$ Water is initially at $120$ C and is pumped through the pipe at a flow rate of $6\mathrm{.}414$ kg$/$s$.$ What is the water temperature exiting the pipe? What is the final exiting temperature if the pipe diameter is $0\mathrm{.}073$