The border between the outer core and the inner core is about 5,100 km<span> below the surface of the Earth. (The crust is usually between 3 and 70 km thick, being thicker in the continents and thinner in the oceans,)
Hope this helps, </span>
The answer is that they are less likely to have a modern lifestyle because people who live in the interior regions are likely to follow their traditional lifestyle in means of having to live through their traditions and disregarding other lifestyle such as the modern that does not define their culture.
There is no set number of "lines" of longitude. You're free
to draw as few or as many 'lines' to mark the 360 degrees
of longitude on the Earth's surface.
However many lines you decide to draw on your map or globe,
they ALL cross the equator.
