Question

The length of a pencil is $8cm$. Identify the magnitude and the unit.

• A. $8$ - magnitude, $cm$ - unit
• B. $cm$ - magnitude, $8$ - unit
• C. $4$ - magnitude, $cm$ - unit
• D. $cm$ - magnitude, $4$ - unit

Answer 1

The correct option is A $8$ - magnitude, $cm$ - unit

The measurement of any quantity is always expressed in two parts; one magnitude and the other unit. Here, the length of the pencil is $8cm$ which means that the measuring unit is $cm$ and we need $8$ such units to represent the entire length of pencil. Thus, the magnitude is $8$ and the unit is $cm$ .