an observer hears an echo 1.26 seconds after blowing a whistle near a cliff. calculate the distance of the observer from the cliff. [speed of sound in air = 330ms-1]

by | Jan 26 | Physics WAEC | 0 comments

A. 104.4m
B. 207.9m
C. 415.8m
D. 523.8m

Correct Answer: Option B

B. 207.9m

Explanation

S = vt/2

=330×1.26/2 = 207.9

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