I see a bird flying away at a constant speed of 1.7568 kmph in the sky. The angle of elevation is `60^@`. After `1/2` minute I see the bird again and this time the angle elevation is `45^@` . The horizontal distance of the bird from me now will be: (a) 10m (b) 10`sqrt(3)`m (c) 20m (d) 20`sqrt(3)`

I see a bird flying away at a constant speed of 1.7568 kmph in the sky. The angle of elevation is 60^@. After 1/2 minute I see the bird again and this time the angle elevation is 45^@ . The horizontal distance of the bird from me now will be: (a) 10m (b) 10sqrt(3)m (c) 20m (d) 20sqrt(3)

Find the angle of elevation of a point which is at a distance of 30 m from the base of a tower 10sqrt(3) m high.

What is the angle of elevation of the top of a temple of height 10 m at a point whose distance from the base of the tower is 10 sqrt 3 m?

If the angle of elevation of a tower from a distance of 100 metres from its foot is 60^@ , then the height of the tower is (a) 100sqrt(3)m (b) (100)/(sqrt(3))m (c) 50sqrt(3)m (d) (200)/(sqrt(3))m

If the shadow of 10 m high tree is 10 sqrt 3 m . Then find the angle of elevation of the sun.

A boy standing on the ground finds a bird flying at a distance of 100 m from him at an elevation of 30^@ . A girl standing on the root of 20m high building finds of angle of elevation of the same bird to 45^@ . The boy and the girl are on opposite sides of the bird. Find the distance of the bird from the girl, correct to nearest cm.

The height of a tower is 100 m. When the angle of elevation of the sun changes from 30o to 45o , the shadow of the tower becomes x metres less. The value of x is (a) 100 m (b) 100sqrt(3)m (c) 100(sqrt(3)-1)m (d) (100)/(sqrt(3))m

A boy standing in the middle of a field, observes a flying bird in the north at an angle of elevation of 30^(@) and after 2 minutes, he observes the same bird in the south at an angle of elevation of 60^(@) . If the bird flies all along in a straight line at a height of 50sqrt(3) m, then its speed in km/h is

A man standing in the midst of a field observes, a flying bird in his north at an angle of elevation of 30^@ and after 2.5 minutes he observes the bird in his south at an angle of elevation of 60^@ . If the bird flies in a straight line all along at a height of 60sqrt3 metres, what is its speed?

The angle of elevation of a bird sitting on top of a tree as seen from the point at a distance of 20m from the base of the tree is 60^(@) . Then, the height of the tree is ……..m