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Length of a pencil is 18 cm and its diameter is 8 mm what is the ratio of the diameter of the pencil of that of its length ?
Given: Length of a pencil is $18\ cm$ and its diameter is $8\ mm$.
To do: To the ratio of the diameter of the pencil of that of its length.
Solution:
As given, length of the pencil$=18\ cm=180\ mm$
Diameter of the pencil$=8\ mm$
Therefore, ratio of the diameter of the pencil of that of its length$=\frac{8}{180}$
$=\frac{2}{45}$
$=2:45$
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