A 50 cm diameter spherical vessel is completely filled up with a liquid of specific gravity 0.8; the vessel and the liquid are then rotated about the vertical axis, without relative motion, at a...

Extracted text: A 50 cm diameter spherical vessel is completely filled up with a liquid of specific gravity 0.8; the vessel and the liquid are then rotated about the vertical axis, without relative motion, at a rotational speed of 20 rad/s. The points of maximum pressure lie on a horizontal plane below the centre of spehere by (a) 12.5 сm (b) 6.96 cm (c) 2.45 cm (d) 1.96 cm