SSC CPO SI and ASI 2012 Paper

Question : 126 of 200

Marks: +1, -0

A spherical lead ball of radius 10 cm is melted and small lead balls of radius 5 mm are made. The total number of possible small lead balls is

Solution:

(1)Radius of bigger spherical lead ball is r= 10 cm =100 mm and radius of smaller lead ball is

r_{s}=5 \ {mm}

So, the total number of spherical lead ball will be

{ {4}/{3} \πr^{3}}/{ {4}/{3} \π r_{s}^{3}}=\ {r^{3}}/{r_{s}^{3}}= {100^{3}}/{5^{3}}=8000.

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