A ladder 17 m long reaches a window of a building 15 m above the ground. What is the distance of the foot of the ladder from the wall?
A
8 m
B
6 m
C
2 m
D
4 m
Correct Option:
A
Explanation
The ladder, wall and ground form a right-angled triangle. Taking the ladder as the hypotenuse, 17² = 15² + x². Thus x² = 289 − 225 = 64, giving x = 8 m.
