A cylindrical tub of radius 16 cm contains water to a depth of 30 cm. A spherical iron ball is dropped into the tub and thus level of water is raised by 9 cm. What is the radius of the ball?
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Volume of the water displaced by iron ball in cylindrical tub =
=
Now , let x be the radius of the ball .
Volume of spherical iron ball =
Clearly , volume of spherical ball = volume of water displaced in cylindrical tub
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