Question

A pencil is placed next to a ruler such that the ends of it, are at $6.2\text{cm}$ and $13.9\text{cm}$ markings on the ruler. What is the length of the pencil?

• A. $6.7\text{cm}$
• B. $7.7\text{cm}$
• C. $8.3\text{cm}$
• D. $7.3\text{cm}$

Answer 1

The correct option is B $7.7\text{cm}$

The length of any object can be calculated as the difference in the readings between the ends of the object.
Therefore, the length of the pencil is:
$13.9\text{cm}-6.2\text{cm}=7.7\text{cm}$