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प्रश्न
A person fires a gun in front of a building 167 m away. If the speed of sound is 334 ms−1, calculate the time in which he hears an echo.
संख्यात्मक
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उत्तर
Distance between building and person (d) = 167 m
Speed of sound (v) = 334 ms−1
\[ \text{Time } (\mathrm{t}) = \frac{2d}{v} \]
\[ = \frac{2 \times 167}{334} \]
= 1.0 s
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