Question

A boy fires a gun and hears an echo 3 seconds later, if he
is 495 m away from a wall. Calculate the velocity of
sound. pls show workings

Answer 1

Answer:

• The velocity of sound is 165 m/sec.

Explanation:

Given that:

• A boy fires a gun and hears an echo 3 seconds later, if he is 495 m away from a wall.

To Find:

• The velocity of sound.

We have:

• Time = 3 seconds
• Distance travelled = 495 m

Formula used:

• Speed = Distance/Time

Finding the velocity of sound:

⟶ Velocity of sound = 495/3 m/sec

⟶ Velocity of sound = 165 m/sec

Answer 2

Given

• Distance = 495 m
• Time taken = 3 sec

To find

• Velocity of sound

Solution

• Distance = Speed × Time
• Speed = Distance / Time

Substituting we get :-

• Speed = 495/3
• Speed = 165

Hence, the velocity of sound is 165 m/s