Question

46. When two sound waves of frequencies 68 Hz and 85 Hz
respectively are emitted, their wavelengths in air differ
by one metre. What is the velocity of sound in air ?
(a) 320 m/s
(b) 330 m/s
(c) 340 m/s
(d) 350 m/s​

Answer 1

Answer:

I don't know this answer