Kris is standing between two parallel walls. The walls closest to him is at a distance of 660m. If he shouts, he hears the first echo after 4s and another after 2s.
*What is the velocity of sound in air ?
*What is the distance between the two walls?
Answers
Answer:
1650 m
Explanation:
Complete step by step solution:
Let us consider the given in the question,
Distance =660m
First sound =4s
Second sound =2s
Now we have to calculate the velocity of sound in air:
Velocity = DistanceTime
Velocity =6602m/s
Velocity =330m/s
Therefore, the velocity of sound in air is 330m/s
Now we have to the distance between the two walls:
For the first wall,
Distance For the first wall,
Hence, we have already known that,
Velocity =330m/s
Time =4s
Distance=Velocity×Time
Distance =330×4
Distance =1320m→(1)
For the second wall,
Time =2s
Velocity =330m/s
Distance =330×2
Distance =330×1
Distance =330 m→(2)
Adding equation (1)
and (2)
,
Distance between 1st
wall +
distance between 2nd
wall = distance between two walls
Distance between two walls =1320+330
Distance between two walls =1650m
∴ The distance between 2
the walls is =1650m.
Explanation:
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