A fence 8 feet tall runs parallel to a tall building at a distance of 3 feet from the building.

What is the length of the shortest ladder that will reach from the ground over the fence to the wall of the building?
Length of ladder = feet.

Question

A fence 8 feet tall runs parallel to a tall building at a distance of 3 feet from the building.

What is the length of the shortest ladder that will reach from the ground over the fence to the wall of the building?
Length of ladder =  feet.

anonymous · Answer

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Now use trigonometry supposing length of ladder sections as x and y and using sine and cosine for right angles.
differentiate total length wrt A and make it zero.
you will get tanA now find required values and find length.
Answer is slight wierd.

anonymous · Answer

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