Problem $3$

Consider a laminar flow of air at $20C$ over a flat plate. The plate is positioned parallel to the flow and the free$-$stream velocity is $22\frac{m}{s}.$ A stagnation tube is inserted in the boundary layer some distance $x$ downstream of the leading edge. The distance between the centre of the tube and the wall is $2mm.$ Using the tabulated Blasius solution, estimate $x$ if the tube measures $20mm$ of water $[$gage$].$