Therefore, a sound intensity of 20 dB is not twice as loud as a sound intensity of 10 dB, but is 10 times as loud, and a sound intensity of 30 dB is 100 times as loud as a sound intensity of 10 dB. Similarly, a sound intensity of 50 dB would be 10,000 times as loud (10 x 10 x 10 x 10) as a sound of 10 dB. This is how the decibel scale works. It is totally unlike the linear percent scale. Now lets see the fallacy of trying to compare this âfunnyâ decibel scale to the percent scale.
Report Abuse. 1  Fastest time to run a mile is around 4 minutes. 2  The average time to walk a mile is 12 minutes, so half a mile would be 6 minutes. 3  well the average human walks at 3 mph so thats a mile every 20 mins and half a mile every 10 mins.  i walk a mile every morning in 15-20 minutes, so probably 10 minutes.
It takes 60% as long as it does to walk a mile. If you walk 3 miles/hour, it takes you 20 minutes to walk a mile, and 12 minutes to walk a kilometer.t takes 60% as long as it does to walk a mile. If you walk 3 miles/hour, it takes you 20 minutes to walk a mile, and 12 minutes to walk a kilometer.