Question

d) A hammer is struck hard on a railway line. How far will the sound travel in 5 sec? Assume that the
velocity of sound in iron is 5100m/s​

Answer 1

Given that,

• Velocity of the sound = 5100 m/s (v)

• Time = 5 seconds (t)

• Distance = ? (D)

we know,

⇒ Distance = Velocity × time

⇒ Distance = 5100 m/s × 5 sec

⇒ Distance = 25500 m

∴ The distance travelled by the sound is 25500 m (or) 25.5 km

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Answer 2

The distance covered by the sound wave is 12750 meters.

Explanation:

It is given that :

Velocity of sound in iron is 5100 m/s, v = 5100 m/s

We need to find the distance traveled by the sound wave in 2.5 seconds. Speed of a wave is equal to the distance covered by wave per unit time.

So, the distance covered by the sound wave is 12750 meters. Hence, this is the required solution.