We are working with completing ratios.
So we have the initial ratio 1:40.
We need to solve 6:x
What we do to one side of a ratio, we have to do to the other so it is even.
We multiplied the blueprint by 6, so we need to multiply the other side.
6×40
240
So, the actual length is 240 in (not sure if that is the unit of measurement since it is not listed).
