Question

A man standing in a valley between 2 parallel mountains fires a gun and hears echo at an interval of 2 sec and 3.5 sec. What is distance between 2 mountains. Location of the man with respect to the mountain

Answer 1

speed of sound we take as: 340 m/sec
distance travelled by the wave to reach the man in 2 sec will have to travel "2x" distance
so 340 = 2x/2,
x = 340 m.
Now for the mountain 2
distance to be travelled : 2(d-x) 
340 = ​2(d-x)/3.5
d - x = 595 m
and d = 935 m 

Answer 2

Answer:

answer is 935...hope it helped u