Convert into centimetres (in decimals):

(a) $ 3 \mathrm{~mm} $

(b) $ 56 \mathrm{~mm} $

(c) $ 8 \mathrm{~cm} 4 \mathrm{~mm} $

Given:

(a) \( 3 \mathrm{~mm} \)

(b) \( 56 \mathrm{~mm} \)

(c) \( 8 \mathrm{~cm} 4 \mathrm{~mm} \)

To do:

We have to convert the given lengths into centimetres.

Solution:

We know that,

$1\ cm=10\ mm$

This implies,

$1\ mm=\frac{1}{10}\ cm=0.1\ cm$

Therefore,

(a) $3\ mm$

$3\ mm = 3\times0.1\ cm = 0.3\ cm$

(b) $56\ mm$

$56\ mm =56\times0.1\ cm = 5.6\ cm$

(c) $8\ cm 4\ mm$

$4\ mm=4\times0.1\ cm = 0.4\ cm$

$8\ cm 4\ mm=(8+0.4)\ cm=8.4\ cm$

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Updated on: 10-Oct-2022

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