Class X

The angle of elevation of the sun, when the length of the shadow of a tree 3 times the height of the tree, is:
  1. 30º
  2. 45º
  3. 60º
  4. . 90º
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
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
The angle of elevation of a ladder leaning against a wall is 60º and the foot of the ladder is 4.6 m away from the wall. The length of the ladder is:
  1. 2.3 m
  2. 4.6 m
  3. 7.8 m
  4. 9.2 m
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