Answer :

Volume of a sphere = (4/3)πr3


Volume of a cylinder = πr2h


Volume of water displaced = Volume of the iron ball


Given, cylindrical tub of radius 12 cm contains water to a depth of 20 cm. A spherical form ball is dropped into the tub and thus the level of water is raised by 6.75 cm



r3 = 729


r = 9 cm


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