Air France Flight 68 flew out at 7 p.m. when all the 350 passengers had boarded the plane as scheduled.
As the plane flew off towards the mountains in the distance the sound of its engines gradually ______.
As the plane flew off towards the mountains in the distance the sound of its engines gradually ______.
As the plane flew off towards the mountains in the distance the sound of its engines gradually ______.
Scientists flew there
An aircraft flew from A to B at an average speed of 230 mph. It returned from B to A at an average speed of 300 mph. What was its average speed for the two journeys?