Correct answer is... 17 m. It is equal to 57 ft. Larger aircraft length is often connected to higher passangers or cargo capacity of an aircraft. The longest civil aircraft is 84 m (275 ft) long, so Northrop Grumman E-2 Hawkeye has 21% percent of it's length. Typical jet airliners has about 35m, so in the comparision Northrop Grumman E-2 Hawkeye has 21% of aircrafts like B737 or A320.
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