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A man, facing a high wall, notices an echo is heard 4.0 seconds after he...

A man, facing a high wall, notices an echo is heard 4.0 seconds after he makes a sharp sound. After walking 200 m directly towards the cliff, an echo is heard after 3.4 seconds. calculate (i)the speed of sound (ii) how far he was from the wall when he made his second observation of the echo.?
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Asked by King fresh on 30th May, 2020
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