Question

So if 3 paper clips equal 9 cm how many paper clips equal 15cm?

Answer 1

Given,

The number of paper clips used for 9 cm paper is 3.

Consider, the number of paper clips used for 15 cm paper,

By proportionality,

`\begin{gathered} (3)/(9)=(x)/(15) \\ 3*15=9* x \\ (45)/(9)=x \\ x=5 \end{gathered}`

Hence, the number of paper clips used for 15 cm of paper is equal to 5.