A sound note of frequency 250 Hz and wavelength 1.3m is produced at a point
PHYSICS
WAEC 1995
A sound note of frequency 250 Hz and wavelength 1.3m is produced at a point near a hill. If the echo of the sound is received 1 second later at the point, how far away is the hill from the point?
- A. 131.3m
- B. 162.5m
- C. 248.7m
- D. 251.3m
Correct Answer: B. 162.5m
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