A vertical tower stands on a declivity which isinclined at `15^@` to the horizon. From the foot of the tower a man ascends the declivity from 80 feet and then finds that the tower subtends an angle of `30^@`. The height of the tower is

A vertical tower stands on a declivity which is inclinde at 15^(@) to the horizon. From the foot of the tower a man ascends the declivity from 80 feet and then finds that the tower subteds an angle of 30^(@) . The height of the tower is

A vertical tower stands on a declicity which is inclined at 15^@ to the horizon. From the foot of the tower a man ascends the declivity for 80 feet and then finds that the tower substends an angle of 30^@ . The height of the tower is

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

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 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