Mach 0.80 (530 mph or 458 knots) at 35,000 ft.
At cruise altitude (35,000ft) the average cruise speed is 460 knots - 530mph.
155 knot average
Its top speed, according to Boeing, is 609 mph
a fully loaded 757-200 has a range of 7600kilometers if equipped with winglets, the cruise speed of this model is about 850km/h 7600/850= 8.94 almost 9hours when cruising on a full tank
138 knots average
The top speed of a Boeing 757 is approximately 600 miles per hour (965 kilometers per hour). This speed can vary slightly depending on the specific model and configuration of the aircraft, as well as factors like altitude and weight. The Boeing 757 is known for its efficient performance and is often used for both domestic and international flights.
it is commonly 140 mph on average
from wikipediaCruise speed Mach 0.80 (530 mph, 458 knots, 850 km/h at cruise altitude, i.e. 35,000 ft or 10.66 km)
757
the cost of a Boeing 757-200 is $65 million and the cost of a 757-300 is $80 million
It honestly depends on what type of 757 you use. 757-200, -200F, -200WL, or -300 Boeing 757-200: 3,900 nautical miles Boeing 757-200F: 3,150 nautical miles Boeing 757-200WL: 4,100 nautical miles Boeing 757-300: 3,467 nautical miles
747