Question

A ladder 15 m long reaches a window which 9m 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 to reach a window 12 m high. Find the width of the street.

Answer 1

Answer:

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Answer 2

Answer:

In △ADC,

AD² + AC² = CD²

9² + AC² = 15²

AC² = 225−81

AC = 12 m

In △BEC,

EC² = BC² + BE²

15² = 12² + BC²

225−144 = BC²

BC = 9 m

Width of the road = AC+BC = 12+9 = 21 m

Step-by-step explanation:

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