Question on: WAEC Physics - 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
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Correct Option: B

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