
If two similar waves are traveling in the same medium, then they have same wave velocity. so we can infer that

Now, as per the formula ~ we know that :

Now, we can write it as :

And it's also given that frequency of wave A is 3 times that of frequency of wave B.
So, let's add the relation to our equation ~



So, choice C is correct ~
Answer:
D
Explanation:
a story about gods or goddesses
Answer:
Shining down
Explanation:
A participle is a cause (an event or situation, typically one that is bad or undesirable) that happen suddenly, unexpectedly, or prematurely.