An electric pole is 10m high A steel wire tide to the top of the pole is affixed at appoint on the ground to keep up right . If the steel weire makes an angle 45ᵒ with the horizontal through the foot of the pole Here , the length of the steel wire is

Two ships are sailing in the sea on the two sides of a lighthouse. The angle of elevation of the top of the lighthouse is observed from the ships are 30° and 45° respectively. If the lighthouse is 100 m high, the distance between the two ships is:

From a point P on a level ground, the angle of elevation of the top tower is 30º. If the tower is 100 m high, the distance of point P from the foot of the tower is: