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An observer is 660 m away from a thundercloud. The sound of thunder reaches him after (V = 330 m/s)

A20 seconds only
B5 seconds only
C0.5 seconds only
D2 seconds
Answer & Solution
Correct answer: D. 2 seconds
1. Time taken = distance / speed. 2. = 660 / 330. 3. = 2 seconds. 4. So sound reaches the observer after 2 s. _Source: Selina Concise Physics Class 9, Ch 8 Sound (Mistral OCR'd PDF), section on lightning and thunder_
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