Theory:

Sphere:
A sphere is a three-dimensional figure obtained by the revolution of a semicircle about its diameter as an axis.
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Volume of a sphere:
Let \(r\) be the radius of a sphere.
 
Volume of a sphere \(=\) 43πr3 cu. units
 
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Example:
Find the mass of \(5\) spherical balls, each of diameter \(8.4\) \(cm\).
 
Solution:
 
Diameter of the spherical ball \((d)\) \(=\) \(8.4 \ cm\)
 
Radius of the spherical ball \((r)\) \(=\) d2=8.42=4.2 \(cm\)
 
Volume of the spherical ball \(=\) 43πr3 cu. units
 
\(=\) 43×227×4.23
 
\(=\) 43×227×4.2×4.2×4.2
 
\(=\) \(310.464\)
 
Volume of the spherical ball is \(310.464 \ cm^3\).
 
Volume of \(5\) spherical balls:
 
\(=\) \(310.464 \times 5\)
 
\(=\) \(1552.32\)
 
Therefore, the volume of \(5\) spherical balls is \(1552.32 \ cm^3\).
Important!
The value of \(\pi\) should be taken as 227 unless its value shared in the problem.