Categories: Physics WAEC

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

Correct Answer: Option C

C. 0.485s

Explanation

t = 2x/v=(2×80)/330

=0.485s

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5 years ago

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