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
Verified Correct Answer: B.
Physical Principles & Numerical Solution
S = \(\frac{vt}{2} = \frac{330 \times 1.26}{2} = 207.9\)
Source: Myschool Past Questions Archive (Record #35767)