UPSC CDS 1 2021 Math Paper

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Question : 80 of 100
 
Marks: +1, -0
A hollow spherical shell is made up of a metal of density 3 g/cm‌3 . If the internal and external radii are 5 cm and 6 cm respectively, then what is the mass of the shell? (Take‌π=
22
7
)
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