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. [Take √3=1.732.]

As observed from the top of a lighthouse, 100 m above sea level, the a

1.	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. [Take √3=1.732.]
Answer» 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 $30^{\circ} t o 60^{\circ}$ . Determine the distance travelled by the ship during the period of observation. [Take $\sqrt{3} = 1.732.$ ]