TNPSC Group 2 2017 Paper

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Question : 12 of 100

Marks: +1, -0

Total surface area of hollow hemisphere is equal to

2 $π$ (R² + r²) sq. units
2 $π$ (R2 - r2) sq. units
$π$ (3R2 + r2) sq. units
$π$ (3R2 - r2) sq. units

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