A sound note of frequency 250 Hz and wavelength 1.3m is p...
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?
131.3m
162.5m
248.7m
251.3m
325.0m
Correct answer is B
No explanation has been provided for this answer.
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