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Uses of Ratios and Proportions

The length of...

Question

The length of a pencil is 16 $c m$ and its diameter is $6 m m$ .What is the ratio of the diameter of the pencil to that of its length.

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Solution

Length of a pencil $=16 \ cm=16 \ cm \times
10=160\ mm$
Diameter of the pencil $6 m m$
Ratio of the diameter of the pencil to that
of its length $= 6 : 160 = 3 : 80$

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