30. Five mark exercise problem VI

An aeroplane at an altitude of $1800 \ m$ finds that two boats are sailing towards it in the same direction. The angles of depression of the boats as observed from the aeroplane are $60^{\circ}$ and $30^{\circ}$ respectively. Find the distance between the two boats. ($\sqrt{3} = 1.732$)

 

Answer:

 

The distance between the two boats is  .