Question

a boy standing 100m from the foot of a high wall claps his hands loudly and the echo reaches him 0.5s later. Calculate the velocity of sound in air using this observation
a) 4x10² m/s
b) 2x10^8 m/s
c) 3.76x10^11m/s
d) 5x10^3 m/s please solve it ​

Answer 1

Answer:

(a)

Explanation:

d=100 m

t=0.5 sec

We know,

v=2d/t

v=200/0.5

v=2000/5

v=400 m/s

v=4×10^2 m/s