00:01
Now over here in this question, we've been given an equation that describes the loudness of the sound.
00:07
So, l is the loudness.
00:09
X is the intensity of the sound.
00:12
So the formula to determine the loudness of sound is given by l is equal to 10 log x upon i0.
00:21
So, as i said, x is the intensity.
00:24
L is the loudness and i not simply the least intense sound that the ear of a normal human can or here you can say.
00:33
Thank you.
00:34
What is being said in the question is, there is a passenger car that is traveling 50 miles per hour and that is 50 feet away.
00:45
Okay.
00:46
That has a loudness of 70 decibels.
00:50
So i'm just writing decibels as db over here.
00:53
Now, if you just put 70 to l, the substitute the value of l as 70 and i not is already given to us as 10 to raise to the power minus 12...