Mathematics · Mensuration
A solid metallic cuboid of dimensions 60 cm × 22 cm × 30 cm is melted and recast into hollow cylindrical pipes of external radius 4 cm, internal radius 3 cm, and length 30 cm. How many such pipes can be made? (Use π = 227)
- 160✓
- 248
- 354
- 466
Correct answer
60
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