A lead pencil consists of a cylinder of wood with solid cylinder of graphite filled in the interior. The diameter of the pencil is 7 mm and the diameter of the graphite is 1 mm. If the length of the pencil is 14 cm, find the volume of the wood and that of the graphite.

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Solution

Radius (r₁) of pencil == 0.35 cm

Radius (r₂) of graphite = = 0.05 cm

Height (h) of pencil = 14 cm

Volume of wood in pencil =

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Q. A lead pencil consists of a cylinder of wood with a solid cylinder of graphite filled in the interior. The diameter of the pencil is

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A lead pencil consists of a cylinder of wood with a solid cylinder of graphite filled in the interior.The diameter of the pencil is 7 mm and the diameter of the graphite is 1 mm.If the length of the pencil is 14 cm, find the volume of the wood and that of the graphite.
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A lead pencil consists of a cylinder of wood with solid cylinder of graphite filled in the interior. The diameter of the pencil is 7 mm and the diameter of the graphite is 1 mm. If the length of the pencil is 14 cm, find the volume of the wood and that of the graphite.

Radius (r1) of pencil == 0.35 cm Radius (r2) of graphite = = 0.05 cm Height (h) of pencil = 14 cm Volume of wood in pencil =

Radius (r₁) of pencil == 0.35 cm

Radius (r₂) of graphite = = 0.05 cm

Height (h) of pencil = 14 cm

Volume of wood in pencil =