Question$-6$:

$(7$ Marks$)$

A vertical enlarging elbow $AB$ is used to deflect water flow at a rate of $45\frac{L}{s}$ in a pipe upward by an angle $=54$ from the flow direction. The elbow discharges water into another continuous pipe at point B $().$ The elbow's cross$-$sectional area is $200c{m}^2$ at the inlet point A and $400c{m}^2$ at point B$,$ as shown in Figure $(6).$ Also, the elevation difference between the centers of A and