Question

a blueprint for a house has a scale factor of 1 inch 3 ft. a wall in the blueprint is 5 in what is the length of the actual wall in feet

Answer 1

15 ft

Step-by-step explanation

you can easily solve this by using a rule of three

Step 1

Let x represents the actual length of the wall in feet

is

`1\text{ inc}\rightarrow3\text{ ft}`

then

`5\text{ in}\rightarrow x`

as the proportion is the same

`\begin{gathered} (1)/(3)=(5)/(x) \\ \text{cross multiply} \\ x\cdot1=5\cdot3 \\ x=15\text{ ft} \end{gathered}`

so, the answer is 15 ft

I hope this helps you