Q. 24.4( 159 Votes )
Find the amount of water displaced by a solid spherical ball of diameter
(i) 28 cm
(ii) 0.21 m
Answer :
Note: when a ball is dropped in any container, the volume of water displaced is
same as volume of sphere as now sphere has taken the place of water.
(i)d =28 cm
As,
r = d/2
= 28/2
Radius (r) = 14 cm
Volume of water displaced = Volume of Sphere = 
πr3
= 
× 
× (14)3
× × 14 × 14 × 14=
× 22 × 2 × 14 × 14
= 
cm3
(ii) d = 0.21 m
As,
r = d/2
= 0.21/2
Radius (r) = 0.105 m
Volume of water displaced =Volume of Sphere = 
πr3
= 
× 
× (0.105)3
= 0.004851 m3
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