as observed from the top of a lighthouse 100m above sea level the angle of depression of a ship sailing directly towards it changes from 30 degree to 60 degree. determine the distance travelled by the ship during the period of observation

Given, AB= 100 m

Let x be the distance travelled by the ship during the period of observation. i.e., CD = x m

Hence, the distance travelled by the ship during the period of observation is 115.47 m

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