How was marakanda protected, and how high is the wall?

Marakanda was protected because of its wall and it was surrounded by a moat.  The high walls were made up of mud bricks and clay.  The height of the wall was 11 meters and they were 8 to 9 meters thick.  It maintained its military importance until the 18th to 19th century.

b.unemployment reached nearly 25 percent.