Question

An echo is returned in 3 s. If the speed of sound is 342 m s–1, then the distance between the
source of sound and the reflecting body is

Answer 1

Explanation:

$\huge\bf{\mid{\overline{\underline{ANSWER}\mid}}}$

$\\ \\ \huge\bold{Given:-} \\ \\ Speed \: \: of \: \: sound = 342 m{s}^{-1} \\ time \: \: when \: \: sound \: \: returns = 3 sec \\ \\ Let \: \: d \: \: be \: \: distance \: \: from \: \: source \: \: to \: \: reflecting \: \: surface..\\ \\ \leadsto Speed = \frac{Distance}{time} \\ \\ \implies \cancel{342} = \frac{\cancel{2}d}{3} \\ \\ \implies 171 \times 3 = d \\ \\ \huge\boxed{d = 513 m} \\ \\ \therefore the \: \: distance \: \: between \: \: the \: \: </p><p>source \: \: of \: \: \\ sound \: \: and \: \: the \: \: reflecting \: \: body \: \: is \: \: 513 m$