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Which planes are you referring to? "Which" implies you've given me some samples to choose from or a problem to solve comparing planes?
If you're wanting to know "what is the fastest plane in the world", then "what" is a more appropriate question. And that's not a math problem.
When you do ask this question elsewhere, be specific - are you wanting to know the record for fasted speed in flight? Are you wanting to know the fastest commercial airplane? Military airplane? Do you mean maximum or on average?
What else can I help you with?
What is the fastest speed of a jet plane?
2,193.167 by the Lockhead SR-71A is the fastest for a jet plane the fastest by any plane was 4,520 by a rocket plane though
Whats the fastest plane?
the fastest plane is the stelt fighter. YEA
Is a stealth fighter the fastest plane in the world?
The SR 71 Blackbird is the fastest plane in the world
What was the x-15 plane?
The X-15 plane was the worlds fastest plane.
What are some facts about airplanes?
The first airplane was made in 1903. The fastest jet plane is SR-71 Blackbird.The SR-71 flies at a speed almost 1000 times higher than the first plane.
How big is the fastest plane?
the engines
Which is the fastest fighter plane?
spitfire
What is the fastest plane invented?
Superman...
What was the x-15?
The X-15 plane was the worlds fastest plane.
Was Concorde the fasted plane that ever flown?
No Concorde was the fastest Commercial passenger airliner ever built. It was not the fastest plane ever built.
How fast can a plane go?
The fastest plane was the Blackbird and it flew at 2500 mph.
Which is the fastest plane or car?
more oftenly ... its a plane rather than a car
