Suppose that 20 pillars of the same height have been erected along the boundary of a circular stadium. If the top of each pillar has been connected by beams with the top of all its non-adjacent pillars, then the total number of beams is

There are 20 pillars of equal height on a circular ground any two non adjacent pillars joined by a beam.Then the number of such beams are:

From two points on the ground and lying on a straight line through the foot of a pillar, the two angles of elevation of the top of the pillar are complementary to each other. If the distances of the two points from the foot of the pillar are 12 metres and 27 metres and the two points lie on the same side of the pillar, then the height (in metres) of the pillar is:

From two points on the ground lying on a straight line through the foot of a pillaer , the two angles of elevation of the top of the pillar are complementary to each other . If the distance of the two points from the foot of the pillar are 9 metres and 16 metres and the two points lie on the same side of the pillar , then the height of the pillar is

The angle of elevation of the top of an incomplete vertical pillar at a horizontal distance of 100 m from its base is 45^(@) . If the angle of elevation of the top of the complete pillar at the same point is to be 60^(@) , then the height of the incomplete pillar is to be increased by

The angle of elevation of the top of an incomplete vertical pillar at a horizontal distance of 100m from its base is 45^@ . IF the angle of elevation of the top of complete pillar at the same point is to be 60^@ then the height of the incomplete pillar is to be increased by

The angle of elevation of the top of an incomplete vertical pillar at a horizontal distance of 50 m from its base is 45^@ . If the angle of elevation of the top of the complete pillar the same point is to be 60^@ ,then the height of the incomplete pillar is to be increased by

The angle of elevation of the top of an incomplete vertical pillar at a horizontal distance of 100 m from its base is 45^(@) . If the angle of elevation of the top of the complete pillar at the same point is to be 60^(@) , then the height of the incomplete pillar is to be increased by