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150 spherical marbles ,each of diameter 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 the level of water in the vessel.
The rise in water is accomplished by displacing the water with the volume of the marbles.
Each marble has a volume of 
The volume of a cylinder is



 = 5.6 cm


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