2010 · Q51
A ladder of 17 ft. length reaches a window which is 15 ft. above the ground on one side of the street. Keeping its foot at the same point the ladder is turned to the other side of the street and now it reaches a window 8 ft. high. What is the width of the street ?
Elementary MathematicsGeometry
- A23 ft.
- B15 ft.
- C25 ft.
- D30 ft.
Explanation
√(289-225)+√(289-64)=8+15=23 ft.