Surface Areas and Volumes
NCERT Exemplar Ch 11
CBSE_NCERT_EXEMPLAR_CH11
Grade 10
Question:
A right circular cylinder of radius $r\text{ cm}$ and height $h\text{ cm}$ ($h > 2r$) just encloses a sphere of diameter:
$r$
$2r$
$h$
$2h$
Step-by-Step Solution
Key Concept: A sphere enclosed in a cylinder of radius $r$ has radius $r$ and diameter $2r$.
Stepwise Solution:
Sphere radius $= r \Rightarrow$ diameter $= 2r\text{ cm}$. [1.0 Mark]
Marking Scheme:
• Identifying sphere diameter $= 2r$: 1.0 Mark
Correct Answer: $2r$
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