A pole 23 m long reaches a window which is 3...

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A pole 23 m long reaches a window which is $$3\sqrt 5 \,{\text{m}}$$ above the ground on one side of a street. Keeping its foot at the same point, the pole is turned to the other side of the street to reach a window $${\text{4}}\sqrt {15} \,{\text{m}}$$ high. What is the width (in m) of the street?

A. 17

B. 35

C. 39

D. 22

Answer: Option C

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