Question: A person standing between two parallel hills fires a gun. He hears the first echo after 1.5 sec, and the second echo after 2.5

A person standing between two parallel hills fires a gun. He hears

A person standing between two parallel hills fires a gun. He hears the first echo after 1.5 sec, and the second echo after 2.5 sec. If the speed of sound is 332 m/s, calculate the distance between the hills. When will you hear the third echo? Options: 1)4sec 2) 5sec 3)6sec 4)2sec

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