• question_answer A circular annular plate having outer and inner diameters of 1.4 m and 0.6 respectively is immersed in water with its plane making an angle of $60{}^\circ$ with the horizontal. The centre of the circular annular plate is 1.85 m below the free surface. The hydrostatic thrust on one side of the plate is: A) 1975 N             B) 19.75 NC) 11.4 N              D) 22.8 N

Hydrostatic thrust on inclined plane $=\rho g\,\,A\bar{x}$ $={{10}^{3}}\times 9.81\times \frac{\pi }{4}[{{(1.4)}^{2}}-{{(0.6)}^{2}}]\times 1.85$ =22.8 Kn