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Question
The speed of sound is 310 ms−1. A person fires a gun. An echo is heard after 1.5 s. Calculate the distance of the person from the cliff from which the echo is heard.
Numerical
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Solution
Speed of sound (v) = 310 ms−1
Time of echo (t) = 1.5 s
\[ \text{Distance } (d) = \frac{vt}{2} \]
\[ = \frac{310 \times 1.5}{2} \]
= 232.5 m
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