A. Mach 3.43
B. Mach 2.91
C. Mach 6.72
D. None of These
Submitted by: Ghusharib Ur Rehman
The NASA/USAF X-15 is the fastest fighter jet ever produced. It reached record top speed of Mach 6.72 or 4,520 mph, which is more than five times the speed of sound.
The correct answer to the question: "The fastest speed of jet ever recorded was ________?" is "Mach 6.72".