A cannon is fired from town X,after how long is the sound heard at a town Y 4.95 km away?
[velocity of sound in the air = 330 ms-1]
A
30 s
B
10 s
C
10 s
D
15 s
Verified Correct Answer: D.
Physical Principles & Numerical Solution
V = X/t
330 = ( 4.95 x 10^3)/t
t = (4.95 x 10^3/330 =
= 15 secs
Source: Myschool Past Questions Archive (Record #14407)