At what approximate altitude did Gagarin separate from the Vostok capsule via ejection?

Answer

About 23,000 feet (7 kilometers)

Gagarin ejected from the capsule at an altitude of approximately 23,000 feet, after which he parachuted separately to the ground.

At what approximate altitude did Gagarin separate from the Vostok capsule via ejection?

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Yuri Gagarin: The first man in space - BBC News - YouTube

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