A person standing between two parallel hills fires a gun. He hears the first echo after 1.5 s and second after 2.5 s . If the speed of sound is 332 m / s calculate the distance between the hills.

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TestHub · Accepted Answer

The person hears the first echo from the nearest hill.

Distance to first hill $d_{1} = v \times t_{1} /2 = 332 \times 1.5/2 = 249$ m.

Distance to second hill $d_{2} = v \times t_{2} /2 = 332 \times 2.5/2 = 415$ m.

Total distance between hills $D = d_{1} + d_{2} = 249 + 415 = 664$ m.

Physics - Sound Wave Question with Solution | TestHub

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