Question 180804
Concept: Inverse Variation
If F varies inversely with L then F=k/L, where k is a constant (number)

Know:  Usually in this problems, you have to find the constant before you can continue to find other frequencies or lenghts 

Answer:
F=k/L
175= k/3
3(175=k/3)
3(175) = 3(k/3)
525 = k
*****
Then F = 525/5
F= 105