As observed from the top of a lighthouse, 100 m above sea level, the angle of depression of
Channel: Doubtnut
Date: 2020-04-12

As observed from the top of a lighthouse, 100 m above sea level, the angle of depression of a ship, sailing directly towards it, changes from `30^(@)` to `60^(@)`. Determine the distance travelled by the ship during the period of observation. [Use `sqrt(3) = 1.732`].