How fast is mach 5?
Mach I is the speed of sound. Therefore, Mach 5 is 5 times as fast as the speed of sound, or about 3806 mph.
Answered by Angela L. -
Older Answers
Mach Speed is the speed of sound; 760 mph. Mach 5 is called "Hyper Sonic" speed and it is approximately 3,800 mile per hour.
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