A. 528m
B. 66m
C. 136m
D. 264m
Correct Answer:
Option C – 136m
Explanation
Time for echo both ways = 0.8
Therefore time for echo in 1 way = 0.8/2 = 0.4
Distance = Speed x time
Distance = 340 x 0.4
Distance = 136m
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![A girl standing some distance from the cliff claps her hands and hears the echo 0.8s later. calculate her distance from the cliff. [speed of sound in air = 320 ms‾¹]](https://erudites.ng/wp-content/plugins/contextual-related-posts/default.png "A girl standing some distance from the cliff claps her hands and hears the echo 0.8s later. calculate her distance from the cliff. [speed of sound in air = 320 ms‾¹]")