alleryA solid cylinder of radius r and height h is melted into a solid cone of the same radius r. The height of the cone is
Ah
B3 h
Ch/3
Dh/2
Answer & Solution
Correct answer: B. 3 h
1. Volume preserved: pi r squared h = (1/3) pi r squared H.
2. Solve for H: H = 3 h.
3. Hence 3 h.
_Source: syllabus Mathematics, Ch 12 "Surface Areas and Volumes", §12.3_
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