Question

A person makes a loud sound and hear the echo of the sound 1.2 seconds later calculate how far the person is from the object causing the eco assume that the speed of sound is 332 meters per second

Answer 1

Time=1.2 seconds

Speed=332

Distance=?

• S×t/2

=332×1.2/2

=166×1.2

=198.2m

Answer 2

Given that,

A person hear the echo of the sound 1.2 seconds later.

Speed of sound, v = 332 m/s

To find,

How far the person is from the object?

Solution,

The distance covered by the sound in the process is 2d. The formula of speed of sound is given by :

$v=\dfrac{2d}{t}\\\\d=\dfrac{vt}{2}\\\\d=\dfrac{332\times 1.2}{2}\\\\d=199.2\ m$

So, the person is at a distance of 199.2 m from the object.

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Echo

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