Question

A sound wave has a frequency of 192 Hz and travels the length of a football field, 91.4 m in 0.27 s. Number of wavelengths in the field is ______(approximate)

• A. 48
• B. 50
• C. 52
• D. 54

Answer 1

The correct option is C 52

$v=d/t=f\lambda$

$d/\lambda =ft=192\times .27$

$=51.84\approx 52$