how do we solve that ?

The subsone wind tumnel in Fig. P5.44 consists of a converging nozzle. test section. diffuser. fan, and connecting ductwork. The test section has a How area of 1.10m2 and a maximum velocity of 120 km hroill C air. The ductwork has a flow area of 48m : The mechancical energy loss in the wind tummel is given by Kl:2. where K=15. Find the meskure atrop acress: the nowale and the power in. pur to the atr hy the lan. Figure P5.44