1.

A person is standing at the sea shore. An observer on the ship which is anchored in between a vertical cliff and the person on the shore fires a gun. The person on the shore hears two sounds, 2 seconds and 3 seconds after seeing the smoke of the fired gun. If the speed of sound in the air is 320 ms–1 then calculate :(i) the distance between the observer on the ship and the person on the shore.(ii) the distance between the cliff and the observer on the ship.

Answer»

(i) d1 = 320 x 1.5 = 320 x 1.5 = 640 m

(ii) d2 = 320/2 = 160 m



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