(a) Define the terms 'pitch ratio', 'real slip ratio' and 'blade area ratio' (6)

(b) The pitch of a propeller is measured by means of a batten and cord. The horizontal ordinate is found to be 40cm while the vertical ordinate 1.15m at a distance of 2.6m from the center of the boss. Calculate the pitch of the propeller and the blade width at the point (10)