Question

a man stands between two cliffs and fires a gun. he hears two successive echos after 3 sec and 5 sec . the distance between the two clifs is(speed of sound = 340m/s )

Answer 1

First case
d = t * s = 6*340 = 2040 m
Second Case
d = t * s = 10*340 = 3400 m
Total Distance = 2040 + 3400 = 5440 m

Answer 2

Case1,

d'=t×speed

d'=3/2×340

d'=510

Case2

d''=5/2×340

d''=850

Distance=d'+d''

=850+510=1360m

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