Q. A person hears the sound of a gunshot 33 seconds after it is fired. If the speed of sound is 330 m/s, what is the distance ?

Formula:

Where:

• d = Distance in metres


• v = Speed of sound in m/s


• t = Time in seconds

Solution:

Speed of sound = 330 m/s
Time = 33 seconds

Convert into kilometres: 10,890 ÷ 1000 = 10.89 km 

Practice Set – Sound and Distance

Q1. A person hears the sound of an event 5 seconds after it occurs. If the speed of sound is 340 m/s, what is the distance ?
A) 1,200 m  B) 1,500 m  C) 1,700 m  D) 2,000 m

Q2. A person hears a sound 8 seconds after it is produced. If the speed of sound is 330 m/s, find the distance.
A) 2.24 km  B) 2.64 km  C) 2.84 km  D) 3.04 km

Q3. Lightning is seen and the thunder is heard 6 seconds later. If the speed of sound is 340 m/s, what is the approximate distance of the lightning ?
A) 1.24 km  B) 1.84 km  C) 2.04 km  D) 2.40 km

Q4. A sound travels at 320 m/s for 15 seconds. What distance does it cover ?
A) 4.2 km  B) 4.6 km  C) 4.8 km  D) 5.2 km

Q5. A person hears a sound 20 seconds after it is produced. If the speed of sound is 350 m/s, what is the distance ?
A) 5 km  B) 6 km  C) 7 km  D) 8 km