Charged pion. GONE!

If a charged pion that decays in \({ 10 }^{ -8 }\) seconds in its own rest frame is to travel \(30m\) in the laboratory before decaying, what must the pion's speed be at least? SJPO 2010, Q42

Use Special Relativity to solve this.
Type your answer in \(m{ s }^{ -1 }\).
Round your answer to 3 significant figures. Take the speed of light to be \(299792458m{ s }^{ -1 }\)

This question is part of my set SJPO Practice Questions


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