150 spherical marbles, each of diameters 1.4 cm, are dropped in a cylindrical vessel of diameter 7 cm containing some water, which are completely immersed in water. Find the rise in level of water in the vessel.
Volume of 150 spherical marbles, each of diameters 1.4 cm = volume of cylindrical vessel of diameter 7 cm
150 x 4/3 x pie x 1.4/2 x 1.4/2 x1.4/2 = pie x 7/2 x 7/2 x h
h = 5.6 cm
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