Answer:
185 units
Explanation:
When two waves meet, they superimpose and the resultant wave has amplitude which depends on the amplitude and phase of the individual waves:
[tex]R=\sqrt{A_1 ^2+A_2^2+2A_1A_2cos\phi}[/tex]
Given:
[tex]A_1= 105 units\\ A_2=80 units\\ \phi=0[/tex] because the waves are in-phase.
[tex]R=\sqrt{(105)^2+80^2+2(105)(80)cos 0}\\ R=\sqrt{(105)^2+80^2+2(105)(80)}\\ R=\sqrt{34225}=185 units [/tex]
