Math, asked by aloksrraj, 11 months ago

A lead pencil consist 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 14cm find the volume of the wood and that of the graphite.

Answers

Answered by krishna401750
1

Answer:

r - radius

volume of pencil = 22/7 * R²H

22/7* 14mm²*140mm (1cm=10mm)

=6160mm³

volume of graphite = 22/7 r² H

22/7 *1mm² *140mm

=440mm³

volume of wood =6160mm³ -440mm³

=5720mm³

Answered by renukumari912200
6

Step-by-step explanation:

r of ✏️=7mm

r of lead=1mm

h of ✏️ and lead =14cm=140mm

volume of ✏️=πr^2h

22/7*7*7*140

2156

volume of lead=22/7*1*1*140

440

volume of wood=2156-440

1716

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