Question

32. 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 7mm and the diameter of the graphite is 1mm if the
length of the pencil is 14 cm, find the volume of the wood and that of graphite,​

Answer 1

Answer:

Step-by-step explanation:

volume of graphite=πr^2h

=22/7×1/20×1/20×14

=11/100cm^3

volume of wood= volume of graphite with wood- volume of Graphite

=22/7×7/20×7/20×14-11/100

=49×11/100-11/100

=539/100-11/100

=528/100

=5.28cm^3