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18 September, 23:00

What is the length of the diagonal of a rectangle whose width is 90 cm and whose length is 200 cm? (Round your answer to the nearest whole centimeter.)

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  1. 18 September, 23:23
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    Answer: the answer is c.

    Step-by-step explanation: Let W, L and D = the width, length and diagonal of the rectangle, respectively.

    Then, by the Pythagorean theorem,

    W^2 + L^2 = D^2

    D = sqrt (W^2 + L^2)

    = sqrt (90^2 + 200^2)

    = sqrt (48100)

    = 10 sqrt (481)

    None of the choices offers an exact solution. However, an approximate solution is:

    10 sqrt (481) ≈ 219.317,

    which rounds to 219, so the closest answer is C.
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