1. The problem statement, all variables and given/known data The fundamental frequency of a stretched string is 200Hz. when the length of the string is doubled and Tension of the string made 100times the initial Tension, what is the new fundamental frequency of the string. (1) 50 Hz (2) 100 Hz (3) 200Hz (4) 400 Hz (5) 800 Hz 2. Relevant equations F = 1/2L x sqrt(T/ m) 3. The attempt at a solution The answer I get is 1000Hz.