If one lawn mower causes an 80-dB sound level at a nearby point,what sound level at that point would four lawnmowers together cause?

Name: If one lawn mower causes an 80-dB sound level at a nearby point,what sound level at that point would four lawnmowers together cause?
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The Answer of If one lawn mower causes an 80-dB sound level at a nearby point,what sound level at that point would four lawnmowers together cause?

If One Lawn Mower Causes an 80-DB Sound Level at a Nearby