A ladder 10 m long rests against a wall. Its foot is 6 m from the wall. Find the height, in metres, reached by the ladder.

Question

G1 Physics · Accepted Answer

The wall, ground and ladder form a right triangle. Ladder is hypotenuse 10 m and base is 6 m. By Pythagoras, h²=10²−6²=100−36=64, so h=8 m.