an observer hears an echo 1.26 seconds after blowing a whistle near a cliff. calculate...

WAEC 2014

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]

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

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Correct Answer: Option B

Explanation

S = \(\frac{vt}{2} = \frac{330 \times 1.26}{2} = 207.9\)

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an observer hears an echo 1.26 seconds after blowing a whistle near a cliff. calculate...

Correct Answer: Option B

Explanation

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