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# Solution - 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. - CBSE Class 9 - Mathematics

ConceptVolume of a Cylinder

#### Question

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.

["Assume "pi=22/7]

#### Solution

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#### APPEARS IN

NCERT Mathematics Textbook for Class 9
Chapter 13: Surface Area and Volumes
Q: 7 | Page no. 231

#### Reference Material

Solution for question: 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. concept: Volume of a Cylinder. For the course CBSE
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