Which aircraft typically cruise at speeds around 490 knots?

Answer: B — Boeing 777, 787 and Airbus A350

The response indicates that the Boeing 777, 787, and Airbus A350 typically cruise at speeds around 490 knots. This is accurate because these aircraft are designed for long-haul commercial flights and are optimized for high-efficiency cruising. The Boeing 777 is known for its speed range and performance characteristics that allow it to operate efficiently at cruise speeds around 490 knots. Similarly, the Boeing 787, with its advanced aerodynamic design and technology, also has a cruising speed that falls within this range. The Airbus A350, lauded for its fuel efficiency and modern design, shares comparable cruising speeds as well. All three aircraft are developed to compete in the same market and have similar operational envelopes, which often include cruising speeds around the 490 knots mark. The other options feature aircraft that either operate at significantly lower speeds or represent different classifications that do not typically approach the cruising speed mentioned.