A ladder 61 m long reaches a window which is 60 m
above the ground on one side of a street. Keeping its foot
at the same point, the ladder is turned to the other side of
the street to reach a window 11 m high. Then the width
of the street is
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Width of the street is 71 m.
Given:
A ladder 61 m long reaches a window which is 60 m above the ground on one side of a street. Keeping its foot at the same point, the ladder is turned to the other side of the street to reach a window 11 m high.
To Find:
The width of the street.
Solution:
Given,
AB = 11 m
AC = 61 m
EC = 61 m
ED = 60 m
Let the width of the street be x.
In triangle ABC, applying Pythagoras theorem
AC² = AB² + BC²
61² = 11² + BC²
BC = √3600
BC = 60 m
In triangle ECD, applying Pythagoras theorem
EC² = ED² + CD²
61² = 60² + CD²
CD = √121
CD = 11 m
width of the street be x = CD + BC = 60 + 11 = 71 m.
Therefore, width of the street is 71 m.
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