A man standing at a certain distance blows a horn towards a big wall. He hears the echo after 2s, if the velocity of sound in air is 340 m/s, then the distance between the man and the wall is

Options

A. 850 m
B. 340 m
C. 170 m
D. 680 m

Answer

B

Explanation

`2 x = vt`
`:. X = (vt)/(2) = (340 xx 2)/(2) = 340 m`