Question

a rifle shot is fired in a valley between 2 cliffz.The echo from one cliff is heard 3 sec later.If the velocity of sound in air is 330 m/sec,then find width of the valley.

Answer 1

2d=3*330
d=990/2
d=495m

Answer 2

Hey.....Here is your ans u r looking for...
echo listen after 3s...
time taken by sound to go to the cliffz =3/2 =1.5s
speed of sound = 330m/s
s= d/t
d= s×t
d=330×1.5
d=495m
Hence distance between two cliffz is 495m