Sound travels in air at an average speed of nearly________ ?
Correct answer: B. 755 miles per hour
- A. 1257 miles per hour
- B. 755 miles per hour
- C. 330 miles per hour
- D. None of these
Explanation
Sound travels through air at about 343 metres per second, which is roughly 767 miles per hour under ordinary conditions. Therefore 755 miles per hour is the closest option.
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