WAEC Mathematics 2019 Paper

Concept:The ladder, the ground, and the pole form a right-angled triangle. The ladder is the hypotenuse.Explanation:Distance from the foot of the ladder to the base of the pole is the base: $6\,m$. Height where the ladder rests against the pole is the perpendicular: $8\,m$. Let the length of the ladder be $H$. By Pythagoras' theorem: $H^2 = 6^2 + 8^2$. So, $H^2 = 36 + 64 = 100$. Therefore, $H = \sqrt{100} = 10\,m$.Answer:The ladder is $10\,m$ long. Correct option: C. 10m