Final answer:
The student's question is about the danger area around an idling turbojet engine. The safety zone generally extends about 25 feet in front of the engine and 200 feet behind it, varying with engine power and specific guidelines.
Step-by-step explanation:
The question pertains to the safety concerns regarding the operation of turbojet engines, specifically the distance at which idling engines pose a risk to individuals in the vicinity.
Although the question mentions the acceleration and capabilities of a turbofan jet engine, such as the GE90-110B1 on a Boeing 777, these details are not directly relevant for establishing a safety distance. The danger area of a jet engine primarily depends on the engine's thrust and operational state, not solely on its acceleration characteristics from a stationary state.
For an idling turbojet engine, the danger area is generally acknowledged to extend approximately 25 feet (7.62 meters) from the engine intake and around 200 feet (60.96 meters) behind the engine where the jet blast is present. This distance can be significantly higher for engines running at higher power settings. Always refer to specific manufacturer guidelines and airport regulations for precise measurements and to ensure compliance with all safety protocols.