Question

A new pencil is 30 cm long. After a few days, it becomes 15 cm. What is the scaling factor here?

• A. 2
• B. $\frac{1}{2}$
• C. 4
• D. $\frac{1}{4}$

Answer 1

The correct option is B $\frac{1}{2}$

$\text{Given,}$

$\text{Height of the new pencil = 30 cm}$

$\text{Height of the pencil after a few days = 15 cm}$

$\frac{1}{2}\times \text{Height of the pencil = Height of}$
$\text{the pencil after a few days}$

$\frac{1}{2}\times 30=15$

15 = 15

$\text{Hence, the scaling factor of the pencil is}\frac{1}{2}$.