# Physics

a boy stands at a distance of 175 m from a high wall. He claps his hands and hears an echo after one second. Calculate the speed of sound in air.

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1. the round trip is 350 m.
So, the speed of sound is 350m/s

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2. A boy stand at a distance of 175 meters from high wall he claps the hands and hear the echo after 1 second calculate it's speed of sound in air

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3. 175m/ s

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