The 4 engine Boeing 707 was replaced by the 2 engine 757.
The 707 is made by Boeing.
A Boeing 707-120B can fly about 540 knots. That is, 1000 kilometers per hour. A Boeing 707-320B can fly about 525 knots. That is, 972 kilometers per hour.
Nothing. It is simply a model number.
Not that big.
Cruising Speed Boeing 707 (currently out of production): 550 mph (885 km/h).
In USA ~ $ 700,000
Boeing 707
The Boeing 707 is a medium-to-long range four engine jet airliner designed and produced by the Boeing Airplane Company in the 1950s. It is equipped with 4 Pratt and Whitney JT3D engines.
707 wingspan is 130 ft. 10 in. 39.9 m.
During take-off the Boeing 707 uses four thousand gallons of petrol (gas).
The first serial number of Boeing planes is 707.