Two vibrating tuning forks produce waves given by y1 = 4 sin 500$\pi $t and y2 = 2 sin506 $\pi $t. Number of beats produced per minute is

Question

Two vibrating tuning forks produce waves given by y₁ = 4 sin 500$\pi $t and y₂ = 2 sin506 $\pi $t. Number of beats produced per minute is