an observer hears an echo 1.26 seconds after blowing a whistle near a cliff. calculate the distance of the observer from the cliff. [speed of sound in air = 330ms-1]
-
A.
104.4m -
B.
207.9m -
C.
415.8m -
D.
523.8m
Correct Answer: Option B
Explanation
S = (frac{vt}{2} = frac{330 times 1.26}{2} = 207.9)