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 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 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 from the first point in line with the tower, it subtends an angle of 30^(@) at the point. If the height of the tower is Hm, then the value of (H)/(25sqrt3) (in meters) 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 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 tower of height b substends an angle at a point O on the leavel of the foot of the tower and at a distance a from the foot of the tower. If a pole mounted on the lower also subtends an equal angle at O, the height of the pole 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 -