Question

If the length of a ladder placed against a wall of a building is 20 meters and the height of a window at the point where the ladder touches the wall is 12 meters, what is the distance between the ladder and the building?

• A. 15 meters
• B. 16 meters
• C. 17 meters
• D. 18 meters

Answer 1

The correct option is B 16 meters


According to the question, square of the distance between the building and the ladder is,
$(20{)}^2-(12{)}^2=400-144$
$=256$
$=(16{)}^2$
$\therefore$ Distance between building and ladder = 16 meters