What is the duration of basic training in army?

Army's basic training lasts 9.5 weeks, not counting processing. Some MOS's allow you to go through OSUT (one-unit-station-training) OSUT is basically where you combine basic, and your mos school (AIT), into one, condensed, time. Infantry, for example, is now 13 weeks, you spend all 13 weeks at the same spot, being taught by the same guys.