Two strings A and B are stretched by the same tension of 50N. String A has length 0.60m and linear density 6×10−3kgm−1, while string B has length 0.90m and linear density 3×10−3kgm−1. What is the ratio of the second harmonic frequency of string A to the third harmonic frequency of string B, f3Bf2A?
(a) 1.00
(b) 0.50
(c) 0.71
(d) 1.41