HomeEveryday Science MCQsspeed of sound in dry air at 20 °C is___________? 1380. speed of sound in dry air at 20 °C is___________?By Admin / September 17, 2025 A. 353 m/s B. 345 m/s C. 343 m/s D. none of them ✅ The correct answer is option C.
1. Which of the following does not pollute the air? Leave a Comment / Everyday Science MCQs / By Admin
2. Which of the following planets have the longest day? Leave a Comment / Everyday Science MCQs / By Admin