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Why do airliners cruise at 11 km and not higher or lower?Thin air saves fuel.Too thin, and the plane can’t fly.Physics picked the altitude.Here’s whyScience and facts💡

Why do airliners cruise at 11 km and not higher or lower?Thin air saves fuel.Too thin, and the plane can’t fly.Physics picked the altitude.Here’s whyScience and facts💡
Why do airliners cruise at 11 km and not higher or lower?Thin air saves fuel.Too thin, and the plane can’t fly.Physics picked the altitude.Here’s whyScience and facts💡

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