Two ships are sailing in the sea on the two sides of a lighthouse. The angle of elevation of the top of the lighthouse is observed from the ships are 30º and 45º respectively. If the lighthouse is 100 m high, the distance between the two ships is: Pick one.
A) 173 m  B) 200 m  C) 273 m  D) 300 m  E) none of these

Rationale: "xplanation : let ab be the lighthouse and c and d be the positions of the ships . then , ab = 100 m , < acb = 30 º and < adb = 45 º . ab / ac = tan 30 answer : c"
Answer: C