Q. 34.1( 8 Votes )

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Answer :

The rise of water level is due to the volume increase caused by the completely submerged sphere.

Volume increase in cylinder= Volume of sphere


We know that


Volume of cylinder= π r2h


Where, r= Radius of cylinder and h= Height of cylinder


Volume of sphere = (4/3) π R3


Where R= radius of sphere


So Volume of cylinder = Volume of sphere


π r2h = (4/3) π R3


(18)2 × h =(4/3) (9)3


h = 3 cm.


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