38. The thickness of a steel plate with material strength coefficient of 210 MPa, has to be reduced from 20 mm to 15 mm in a single pass in a two-high rolling mill with a roll radius of 450 mm and rolling velocity of 28 m/min. If the plate has a width of 200 mm and its strain hardening exponent, n is 0.25, the rolling force required for the operation is kN (round off to 2 decimal places). Note: Average Flow Stress Material Strength Coefficient x- (True Strain)" (1+n) 39. For a Kaplan (axial flow) turbine, the outlet blade velocity diagram at a section is shown in figure. Cf C : Flow velocity C Blade velocity C, Relative velocity The diameter at this section is 3m. The hub and tip diameters of the blade are 2m and 4m, respectively. The water volume flow rate is 100 m/s. The rotational speed of the turbine is 300 rpm. The blade outlet angle is degrees (round off to one decimal place).