Question
What is the speed of sound in air at room temperature
(approx)? ÂSolution
At room temperature (~20°C), speed of sound in air is around 343 m/s.  This speed increases in solids and liquids and decreases at higher altitudes.  It is much slower than light, which travels at 3 × 108, m/s.  That's why we see lightning before hearing thunder.
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Siachen in Himalayas is:
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