Two waves of length 50 cm and 51 cm produced 12 beas per second. The velocity of sound is :

Options

A. 331 m/s
B. 360 m/s
C. 340 m/s
D. 306 m/s

Answer

D

Explanation

Number of beats produced per second.
`=v_(1)-v_(2)=(v)/(lambda_(1))-(v)/(lambda_(2))`
`:.12=v((1)/(50)-(1)/(51))`
(or) `v=12xx50xx51 cm//s`
`=3060 cm//s= 306 m//s`