Question

A blueprint shows a layout of a building. Every 3 inches in the blueprint represents 5 feet of the actual building. one of the Walls on the blueprint measures 21 inches in length what is the length of the actual wall?

Answer 1

In this problem every 3 inches represent 5 feets, so if in the blueprint the wall is 21 inches then we can made a rule of 3 so:

`\begin{gathered} 3\to5 \\ 21\to x \end{gathered}`

so the equation will be:

`x=(21\cdot5)/(3)=35`

So the wall is 35 feets