Question

If a child hears an echo from a cliff $6$ seconds after the sound produced by shouting, how far is the cliff? (speed of sound = $340m/s$)

• A. 58 m
• B. 1032 m
• C. 68 m
• D. 1000 m

Answer 1

The correct option is C 68 m

Given,
Speed of sound = $340m/s$
Time taken to hear an echo = $6s$
Let distance of the cliff be $x$.
Then, $2x=340\times 6$
$\Rightarrow x=\frac{340\times 6}{2}=1020m$