What will be the minimum distance to hear a distinct echo if the speed of sound for $22^{0} C$ in air is 344m/s?

34.4 mm

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16.5 m

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17.2 m

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20 m

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Solution

The correct option is C 17.2 m

Total distance travelled by the Sound wave = 2d
For the echo to be heard the time difference should be t = 0.1 s. Therefore the minimum distance can be calcualted as:
$V = \frac{2 d}{0.1}$
$344 = \frac{2 d}{0.1}$
$344 = 2 d$
$d = 17.2 m$

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What will be the minimum distance to hear a distinct echo if the speed of sound for 220C in air is 344m/s?

The correct option is C 17.2 m Total distance travelled by the Sound wave = 2d For the echo to be heard the time difference should be t = 0.1 s. Therefore the minimum distance can be calcualted as: V=2d0.1 344=2d0.1 344=2d d=17.2m

What will be the minimum distance to hear a distinct echo if the speed of sound for $22^{0} C$ in air is 344m/s?

The correct option is C 17.2 m

Total distance travelled by the Sound wave = 2d
For the echo to be heard the time difference should be t = 0.1 s. Therefore the minimum distance can be calcualted as:
$V = \frac{2 d}{0.1}$
$344 = \frac{2 d}{0.1}$
$344 = 2 d$
$d = 17.2 m$