From an observation tower h meter above the level of river, the angle of depression of a point on the near shore is A and that of a point directly on the far shore is B . Find the width of the river.

From an observation tower h meter above the level of river, the angl

1.	From an observation tower h meter above the level of river, the angle of depression of a point on the near shore is A and that of a point directly on the far shore is B. Find the width of the river.
A.	h (Cot B +Cot A)
B.	h (tanB +tanA)
C.	h (tanA - tan B)
D.	h(cot B-cotA)
Answer» B. h (tanB +tanA)

Discussion

No Comment Found

Related MCQs

The angle of elevation of the top of a tower from a point A on the ground is 30o. On moving a distance of 20 m towards the foot of the tower to a point B, the angle of elevation increase to 60o.The height of the tower is-
From the top of a lamp post of height x metres, two objects on the ground on the same side of it (and in line with the foot of the lamp post) are observed at angles of depression of 30 and 60 , respectively. The distance between the object is $$ {32{ sqrt{3}{ meter}}}$$. The value of x is:
An electrician has to repair an electric fault on a pole of height 4 m. He needs to reach a point 1.3 m below the top of the pole to un dertake the repair work the length of ladder that he should use, which when inclined at an angle of 60 to the horizontal would enable him to reach the required positions is :
There are two towers on a horizontal plane. The top of one tower makes an angle of 60 degrees from the horizontal on the original floor of the second tower. And the top of the second tower makes an angle of 30 degrees from the horizontal on the original floor of the first tower. Find the ratio of the height of the Towers.
The height of a light house is 20 meters above sea level. The angle of depression (from the top of the lighthouse) of a ship in the sea is 30 . What is the distance of the ship from the foot of the light house?
If the angle of elevation of the sun changes from 30o to 45o then length of the shadow of a pillar decreases by 20 meters. The height of the pillar is:
From a point P on a level ground, the angle of elevation of the top tower is 30 . If the tower is 100 meter high, the distance of point P from the foot of the tower is:
The angle of elevation of the foot of a house from the top of a tower is twice the angle made with the top of this house. If the height of the tower is 75 meters. And the elevation angle of the foot of the house from the top of the tower is 60 degrees. So what is the height of the house?
A kite is flying at a height of 50m. If the length of string is 100m then the inclination of string to the horizontal ground in degree measures is:
The distance between the tops of two building 38 metres and 58 metres and high is 52 metres. What will be the distance (in metres) between two building?

From an observation tower h meter above the level of river, the angle of depression of a point on the near shore is A and that of a point directly on the far shore is B . Find the width of the river.

Discussion

No Comment Found

Related MCQs

Reply to Comment

From an observation tower h meter above the level of river, the angle of depression of a point on the near shore is A and that of a point directly on the far shore is B. Find the width of the river.