Find the number of metallic pipes, 1.5 cm in diameter and 0.2 cm thick, to be melted to form a cylinder of height 10 cm and diameter 4.5 cm.
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Radius of the circular disk (r) = 0.75 cm
Height of circular disk (h) = 0.2 cm
Radius of cylinder (R) = 2.25 cm
Height of cylinder (H) = 10 cm
Now,

Height of circular disk (h) = 0.2 cm
Radius of cylinder (R) = 2.25 cm
Height of cylinder (H) = 10 cm
Now,

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