Two tuning forks A and B are sounded together giving rise to 8 beats in 2 s. When fork A is loaded with wax, the beat frequency is reduced to 4 beats…

Two tuning forks $\displaystyle A$ and $\displaystyle B$ are sounded together giving rise to $\displaystyle 8$ beats in $\displaystyle 2$ s. When fork $\displaystyle A$ is loaded with wax, the beat frequency is reduced to $\displaystyle 4$ beats in $\displaystyle 2$ s. If the original frequency of tuning fork $\displaystyle B$ is $\displaystyle 380$ Hz then original frequency of tuning fork $\displaystyle A$ is $\displaystyle \_\_\_\_$ Hz.