Bhautik Study.

Question. In a guitar two strings A and B made of same material are slightly out of tune and produce beats of frequency 6 Hz. When tension in B is slightly decreased, the beat frequency increases to 7 Hz. If the frequency of A is 530 Hz, the original frequency of B will be:

(1) 523 Hz

(2) 524 Hz

(3) 536 Hz

(4) 537 Hz                                            (NEET-2020)