The difference between the lengths of a Boeing 777-300ER and an Airbus A350-1000 is closest to:

The answer is 0.1m because the difference in length between the Boeing 777-300ER and the Airbus A350-1000 is very small. These two aircraft have similar lengths, with the Boeing 777-300ER being approximately 73.9 meters long and the Airbus A350-1000 being approximately 73.8 meters long. Hence, the difference in length is only about 0.1 meters, making it the closest approximation.