Practice question Speed of light in vacuum is approximately: 3 × 10⁸ m/s340 m/s3 × 10¹⁰ m/s3 × 10⁶ m/s Answer: A — 3 × 10⁸ m/s The correct answer is shown above. Try the full quiz for additional practice. Practice more: AAI JE ATC Practice Questions - AAI Junior Executive (Air Traffic Control) Recruitment Exam Exam →