Mathematics · Mensuration
What is the total surface area of a hollow hemisphere with outer radius 'R' and inner radius 'r'?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1π(3R2 - r2) sq. units
- 2π(3R2 + r2) sq. units✓
- 32π(R2 - r2) sq. units
- 42π(R2 + r2) sq. units
Correct answer
π(3R2 + r2) sq. units
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