A boy fires a gun between two parallel mountains and hears the echo after 2.5 second and 4 seconds respectively. Find the distance between the mountains
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Suppose d is the total distance between two cliffs and x is the distance between the man and one cliff.
2x=v×t1
x=2v×t1
=2340×1.5
=255 m
2(d−x)=v×t2
(d−x)=2v×t2
(d−x)=2v×t2
(d−x)=2340×3.5
(d−x)=595 m
d=595+x
=595+255
=850 m
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