Mathematics · Mensuration
A solid sphere of iron having radius 15 cm is to be melted and recast in the shape of a cylindrical pipe having internal and external radii 4 cm and 6 cm, respectively. Find the length (in m) of the pipe thus for med.
- 12.35
- 22.45
- 32.25✓
- 42.15
Correct answer
2.25
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