Class 9 | Chapter 13 | Surface areas and Volumes | Exercise 13.6 | Question 7

Question 7: 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.

Cylinder – Volume & Capacity

In this tutorial, you will learn the meaning of volume and capacity of cylinder and the difference between them, demonstrated with practical examples.

 

Volume of cylinder = πr²h

r = base radius of cylinder, h = height of cylinder 

What is Area / Surface area / Volume

It is recommended to understand the core concept of area, surface area and volume before we attempt any question based on these concepts.

 

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