A girl stand 80m away from a tall cliff and blows a whistle. If the...

WAEC 2004

A girl stand 80m away from a tall cliff and blows a whistle. If the speed of sound in air is 330ms^-1, how long would it take for her to hear the echo of the sound?

A. 2.062s
B. 0.970s
C. 0.485s
D. 0.242s

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Correct Answer: Option C

Explanation

t = \(\frac{2x}{v} = \frac{2 \times 80}{330} = 0.485s\)

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A girl stand 80m away from a tall cliff and blows a whistle. If the...

Correct Answer: Option C

Explanation

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