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A cylindrical piece of metal of radius 2 cm and height 6 cm is shaped into a cone of same radius. The height of the cone is?

18 cm
14 cm
12 cm
8 cm

Correct Answer: 18 cm

Explanation:

∴ 1/3 π x (2)² x h = π x (2)² x 6
⇒ h = 18 cm

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