The frequency of a man's voice is 300 Hz and its wavelength is 1 meter. If the wavelength of a child's voice is 1.5 m, then the frequency of the child's voice is"

Options

A. 200Hz
B. 150Hz
C. 400Hz
D. 350Hz

Answer

A

Explanation

Speed of sound is the property of air medium & same for man & child`implies C=300xx1=fxx1.5`
`implies f=200Hz`.