Question

A boy hears the echo of his own voice from a distant hill after 0.8 second. If the speed of sound in air is 340m/s. Calculate the distance of hill from the boy.​

Answer 1

Answer:

the distant between the boy and mountain is 136m

Explanation:

Given

        velocity=V=340 m/s

        time taken=t=o.8 s

         distant=D=?

SOLUTION:

v=2d/t

d=v*t/2=340*8/2=136 m

Answer 2

Answer:

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The distance of hill from the boy is 136 m.

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Explanation:

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Assume the distance of the hill from the boy be s m.

We know that,

Distance = Velocity × Time

→ 2s = vt

→ s = vt/2

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Some data were provided in the question, which were:

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• v = 340 m/s and
• Time (t) = 0.8 s

→ s = vt/2

$→s = \frac{340 \times 0.8}{2}$

→ s = 340 × 0.4 m

= 136 m

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Thus, the distance of hill from the body is 136 m.