Multiple choice question XLIII — task. Science CBSE, Class 9.

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A man stands before a large wall at a distance of

$50.0\ m$ and claps his hand in regular intervals such that the echo of a clap merges with the next clap. If he has to clap

$10\ times$ in

$3\ seconds$ then, calculate the velocity of sound in air.

$333.33\ ms^{-1}$
$200\ ms^{-1}$
$120\ ms^{-1}$
$666.66\ ms^{-1}$

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