soldier standing between two hills hears two echoes after firing the gun. The first echo was heard after 1.2 s and the second echo after 2.4 secs. Find the distance between the two hills. (velocity=340 m/s) *
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1320 m
Distance of person from nearer cliff, (d1)
=2v×t⇒d1=2330×3=495m
Distance of person from farther cliff, d2=2v×t
d2=2330×5=825m
Total distance between two cliffs
=d1+d2
=(495+825)
=1320m.
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