Question

A boy hears an echo of his own voice from a distant hill after one second. The speed of sound in airis 350 m/s. What is the distance of hill from the boy?

Answer 1

Let the distance of the boy from the hill be $d$. The distance travelled by the sound is therefore $2d$. Then,$v=\frac{2d}{t}\Rightarrow d=\frac{vt}{2}=\frac{350\times1}{2}=175 m.$

Answer 2

Answer:

175m

Explanation:

350*1/2 = 175 m