A sound note of frequency 250 Hz and wavelength... - WAEC Physics 1995 Question
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 option: b
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