Class X

At a point 20 m away from the foot of a tower the angle of elevation of the top of the tower of 30ᵒ.The height of the tower is
  1. 20√3m
  2. (20/√3)m
  3. (√3)/(20)m
  4. None of these
From a point P on a level ground, the angle of elevation of the top tower is 30º. If the tower is 100 m high, the distance of point P from the foot of the tower is:
  1. 149 m
  2. 156 m
  3. 173 m
  4. 200 m
If the length of shadow of a pole on a level ground is twice the length of that pole ,the angle of elevation of then sun is
  1. 60ᵒ
  2. 30ᵒ
  3. 45ᵒ
  4. None of these
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 30° and 45° respectively. If the lighthouse is 100 m high, the distance between the two ships is:
  1. 173 m
  2. 200 m
  3. 273 m
  4. 300 m
The angle of elevation of a tower from from a distance of 200m from its foot is 30ᵒ Height of the tower
  1. 100√3 m
  2. (200/√3)m
  3. 200√3 m
  4. (100/√3) m
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