Q:

The angles of elevation of the top of a tower as observed from the bottom and top of a building of height 80 metre are 60° and 45° respectively. The distance of the base of the tower from the base of the building is:-

• 1
  $$ 40 {(\sqrt{3}-1)}\ metre $$
• 2
  $$ 40 {(3+\sqrt{3})}\ metre $$
• 3
  $$ 40 {(3-\sqrt{3})}\ metre $$
• 4
  $$ 40({\sqrt{3}}+1)\ meter$$