When a plane mirror is placed horizontally on level ground at a distance of 60 m from the foot of a tower, the top of the tower and its image in the mirror subtend and angle of `90^@` at the eye. The height of the tower is

When a plane mirror AB is placed horizontally on level ground at a distance of 60 metres from the foot of a tower, the top of the tower and its image in the mirror subtends, an angle of 90^(@) at B. The height of the tower is :

From a point on the ground which is at a distance of 50 m from the foot of the towe, the angle of elevation of the top of the tower is observed to be 30^(@) . Find the height of the tower.

A tower of height b subtends an angle at a point 0 on the ground level through the foot of the tower and at a distance a from the foot of the tower. A pole mounted on the top of the tower also subtends an equal angle at 0. The height of the pole is

A vertical tower stands on a horizontal plane, and from a point on the ground at a distance of 30 metres from the foot of the tower , the angle of elevation is 60^@ . The height of the tower is

A tower standing on a horizontal plane subtends a certain angle at a point 160 m apart from the foot of the tower. On advancing 100 m towards if, the tower is found to subtend an angle twice as before. The height of the tower is -

A tower standing on a horizontal plane subtends a certain angle at a point 160 m apart from the foot of the tower .On advancing 100 m towards it , the tower is found to subtend an angle twice as be fore .The height of the tower is

A body thrown horizontally from the top of a tower touches the ground at a distance of 160m from the foot of the tower.If the velocity of projection is 40m/s then the height of the tower is (g=9.8m/s^(2))

A vertical tower subtends an angle of 60^(@) at a point on the same level as the foot of the tower. On moving 100 m further in line with the tower, it subtends an angle of 30^(@) at the point. Then, the height of the tower, it subtends an angle of 30^(@) at the point. Then, the height of the tower is