QUESTION $2$

A horizontal pipe carries water from point A to point B as shown below. The flow rate in the pipe

is $0\mathrm{.}05\frac{m^3}{s}.$ The pipe gradually changes in diameter from $200mm$ to $150mm.$ The Pressure

Gauge reading at $A$ is $100$kPa. If total energy loss between A and $B$ is assumed to be negligible,

determine:

a$)$ Pressure reading at $B.$

b$)$ The diameter $(mm)$ at point $B$ if the pressure there is reduced to $30$kPa.