Time (t)= 2.5 s

Speed of sound (V) = 340 m s^{-1}

Distance (d) = ?

V = Distance\over Time

Substituting the values, we get,

340 = d\over 2.5

⇒ d = 340 × 2.5 = 850 m

Therefore, **the distance between the boys = 850 m.**

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## Question

# A boy fires a gun and another boy at a distance hears the sound of fire 2.5 s after seeing the flash. If speed of sound in air is 340 m s-1 , find the distance between the boys.

## Answer

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- Propagation of Sound Waves Class 9 ICSE

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Time (t)= 2.5 s

Speed of sound (V) = 340 m s^{-1}

Distance (d) = ?

V = Distance\over Time

Substituting the values, we get,

340 = d\over 2.5

⇒ d = 340 × 2.5 = 850 m

Therefore, **the distance between the boys = 850 m.**

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