Consider a pipe network system with a pipe section that is $350m$ long, joining node $A$

upstream and node $B$ downstream. The elevations of nodes A and $B$ are $81\mathrm{.}6m$ and

$78\mathrm{.}1m$ respectively. The pipe has a diameter of $150mm$ and a roughness size, $k=$

$0\mathrm{.}36mm.$ If the water flow in the pipe is $0\mathrm{.}025\frac{m^3}{s}$ and the pressure at node $A$ is $210$

kPa, what do you think would be the pressure at the downstream node, B$?$