hi, can some one tell me which is the longest aircraft in the world?is it airbus340-600(OR)is it boeing777ER?or is there any other aircraft longer than these two?
Depends on how you define aircraft...
If you only interested in heavier-than-air, the longest aircraft is Airbus A340-600; it is 247 ft (75.3 m) long.
But zeppelins used to be much longer than that. The Hindenburg, for example, was 804 ft (245 m) long...
Here is a link for the site that have the Top 50 Largest Aircraft:
Antanov holds 200 records and is the longest