alleryThe total surface area of a joined solid is the sum of the:
ACurved areas
BFlat areas
CBase areas
DCross sections
Answer & Solution
Correct answer: A. Curved areas
1. The joined faces are no longer part of the outside.
2. Only the curved surfaces of the parts remain exposed.
3. So the total surface area adds up those curved areas.
_Source: syllabus Mathematics, Chapter 13, Surface Areas and Volumes._
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