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A circular metal sheet 48 cm in diameter and 2 mm thick is melted and recast into a cylindrical bar 6 cm in diameter. How long is the bar?​

User Smasho
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1 Answer

3 votes

Answer:

12.8cm

Explanation:

radius = 0.5 X diameter

2mm = 0.2cm

volume of circular metal sheet = π r² h = π (24)² (0.2) = 115.2π cm³.

volume, V, of cylindrical bar = π r² L

L = V/(π r²)

= 115.2π / (π (3)²)

= 115.2/ 9

= 12.8cm

User Jimiyash
by
8.1k points
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