As long as a ruler :)
203920 years
700 years
I don't think you can sail around Scotland as it is attached to England. maybe there is a canal link between Edinburgh and Glasgow.
Since May 2007
The coastline of Scotland is about 3,700 km (about 2,300 mi) long when measured around the shorelines of the various firths and lochs.
Since 1913 when the Edinburgh Zoo opened.
how long has deforestation been around
As long as guns have been around.
It's from Scotland so it was probably a Scottish cook but it's been around so long the person's name probably isn't known.
how long has the london eye been around for
As long as So Random has been around.
It has been is correct.For he /she/ it or a singular noun subject use has egHe has been to Scotland. The teacher has been to Scotland.For all other subject use have egI have been to Scotland. We have been to Scotland. They have been to Scotland. The teachers have been to Scotland. ( the teachers = a plural subject)