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Surface Areas and Volumes
NCERT Exemplar Ch 11
CBSE_NCERT_EXEMPLAR_CH11
Grade 10
Question:
A medicine capsule is in the shape of a cylinder with two hemispheres stuck to each of its ends. The surface area of the capsule is:
$ ext{CSA of cylinder} + ext{CSA of 2 hemispheres}$ $ ext{TSA of cylinder} + ext{TSA of 2 hemispheres}$ $ ext{CSA of cylinder} + ext{TSA of 2 hemispheres}$ $ ext{TSA of cylinder} + ext{CSA of 2 hemispheres}$
Step-by-Step Solution
Key Concept: Only the curved surfaces are exposed to the outside.
Stepwise Solution:
Surfaces exposed are the curved surface of the cylinder and the curved surfaces of the two hemispheres. [1.0 Mark]
Marking Scheme:
• Identifying correct exposed surface area components: 1.0 Mark
Correct Answer:$\text{CSA of cylinder} + \text{CSA of 2 hemispheres}$
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