$(35$ points$)$

In the horizontal elbow on the bench, Dy $150$ cm $),$ Dy $100cm,V4\frac{m}{s}$ and

D$-100$ cm

The unit volume weight of water is $9\mathrm{.}81k\frac{N}{m^3}$ dit The reaction force of the

elbow is R$98.1$ k Considering that the reaction force has a diameter of $30$ with the horizontal.

a$)$ Find the flow rate $Q$ passing through the elhom.

$b$ Find the pressures $P$ and $P$

$(35$ points$)$