#### Question

A Boeing 747 is cruising at a velocity of 250 m/s at a standard altitude of 13 km. What is its Mach number?

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#### Step 1

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Given

• $V=250\;\rm{m/s}$, velocity of the flight,
• $h=13\;\rm{km}$, altitude of the flight,

It is necessary to determine Mach number, $M$.