Mach 0.87 is approximately 87% of the speed of sound in air. At sea level and at standard atmospheric conditions, the speed of sound is about 343 meters per second (1,125 feet per second), so Mach 0.87 would be around 299 meters per second (980 feet per second). This speed is commonly encountered in high-performance aircraft and is significantly faster than typical commercial jet speeds.
Mach 0.8-1.0
Mach 1.7 is equal to about 1294 mph.
Mach 6 is about 4,449.3 mph
645.38104_MPH_">645.38104 MPH-is 0.87 Mach -
the SR 71 goes really fast it goes Mach 7 NOT Mach 3.
Mach 3.3 is about 2,512 mph depending on altitude.
Mach 889 is about 659,233 mph
mach 2.03
1,750.8 mph
Mach 6 is about 4,567 mph
Mach 0.7 is 533 mi/h (rounded)
mach 2.5.