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March 27, 2017

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A fence that is 4 metres tall runs parallel to a tall building at a distance
of 1 metre 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?

  • Maths - ,

    We form a rt. triangle:

    X = 1 m. = Hor. side.
    Y = 4 m. = Ver. side.
    Z = Hyp. = Length of the ladder.

    Z^2 = X^2 + Y^2
    Z^2 = 1^2 + 4^2 = 17
    Z = 4.1 m.

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