Question:
Sound produced by a thunderstorm is heard $10 \mathrm{~s}$ after the lightning is seen. Calculate the approximate distance of the thunder cloud. (Given speed of sound $=340 \mathrm{~m} \mathrm{~s}^{-1}$ ).
Solution:
Distance of thunder cloud $=$ speed of sound $x$ time $=340 \times 10=3400 \mathrm{~m}=3.4 \mathrm{~km}$.
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