The Frequency of Vibrations of a Piano String Varies Directly

Multiple Choice

The frequency of vibrations of a piano string varies directly as the square root of the tension on the string and inversely as the length of the string.The middle A string has a frequency of 430 vibrations per second.Find the frequency of a string that has 1.25 times as much tension and is 1.4 times as long. ​

A) 373.4 vibrations / sec
B) 343.4 vibrations / sec
C) 353.4 vibrations / sec
D) 383.4 vibrations / sec
E) 363.4 vibrations / sec