How wasp build their home?

How weaver birds build their nests?

From the top of a building 50m from horizontal, the angle of depression made by a car is 30^(@) . How far is the car from the building?

If 36 workers can build a wall in 12 days, how many days will 16 workers take to build the same wall ? (assuming the number of working hours per day is constant)

Which of the following is suitable to water supply in our home?

From the top of a building, the angle of elevation of the top of a cell tower is 60^(@) and the angle of depression to its foot is 45^(@) . If distance of the building from the tower is 7m, then find the height of the tower.

For which of the following spice India is the home?

If the angles of depression of the top and bottom of a short building from the top of a tall building are 30^(@) and 60^(@) respectively, then the ratio of the heights of short and tall buildings is

From the top of a building h meters, the angle of depression of an object on the ground is alpha . the distance( in meter) of the object from the foot of the building is

The angle of elevation of the top of a building from the foot of the tower is 30^(@) and the angle of elevation of the top of the tower from the foot of the building is 60^(@) . If the tower is 30m high, find the height of the building.

A ball is tossed from the window of a building with an initial velocity of 8 ms^-1 at an angle of 20^@ below the horizontal . It strikes the ground 3 s later. From what height was the ball thrown? How far from the base of the building does the ball strike the ground?