A flag staff of height 10 metres is placed on the top of a tower of height 30 metres. At the top of a tower of height 40 metres, the flag staff and the tower subtend equal angles then the distance between the two towers in metres is

At a distance 12 metres from the foot A of a tower AB of height 5 metres, a flagstaff BC on top of AB and the tower subtend the same angle. Then, the height of flagstaff is

At a distance 12 metres from the foot A of a tower AB of height 5 metres, a flagstaff BC on top of AB and the tower subtend the same angle. Then, the height of flagstaff is

A flag - staff of 10 meters high stands on a building of 50 meters height.For an observer at a height of 60 meters,the flag - staff and the building subtend equal angles. The distance of the observer from the top of the flag - staff is

At a distance d from the foot of tower AB of height h metres, a flagstaff BC (surmounted on the tower) and the tower subtend equal angles. Then the height of the flagstaff is :

A tower of height 5 m and a flagstaff on top of the tower subtend equal angles at a point on the ground, distant 13 m from the base of the tower. The height of the flag staff is