A. 17m
B. 34m
C. 85m
D. 170m
E. 680m
Correct Answer:
Option C – 85m
Explanation
X = vt/2 = (340 x 0.5)/2 = 85m
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![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]](https://erudites.ng/wp-content/plugins/contextual-related-posts/default.png "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]")