issb general knowledge MCQ #29

issb general knowledge MCQ #29

1. Question 1

   Q1. Speed of light in vacuum (approx)?

   • A) 3×10⁶ m/s
   • B) 3×10⁸ m/s
   • C) 3×10¹⁰ m/s
   • D) 3×10⁵ m/s

   Answer: 3×10⁸ m/s

   Explanation: ≈ 299,792,458 m/s, often rounded to 3×10⁸ m/s in MCQs. Work each step carefully; ISSB math rewards accuracy under time pressure.