How Does Distance and Quantity Affect Sound Intensity?

[Aoiumi]

Homework Statement

An alarm clock makes a sound that has intensity 60 dB at a distance
of 1 m. What is the sound intensity of 100 such clocks which are all
100m away?
(A) 0.6 dB (B) 40 dB (C) 50 dB (D) 60 dB

Homework Equations

I1/I2 = R2^2/R1^2

The Attempt at a Solution

If it works to make a ratio...

60 dB = 10^-6 W/m^2

10^-6/X = 100^2/1^2

How do the 100 clocks factor into this equation?

Thank you!

 

[jedishrfu]

I think the 100 clocks just increases the intensity by 100x.