Since they are in the same direction, you would add them together. Let’s also assume said direction is positive. 225 N + 165 N = 390 N
The answer you are looking for is B, hope this helps.
Answer:because each speaker has a large angle of of coverage (horizontal and vertical)
They place them apart to prevent their signals (sounds produced) from getting into each other's way as this may cause interference (which may be destructive.
Explanation: