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14 November, 03:32

Osha requires a ladder to meet the ground at 75 degree angle in order to function as safely as possible. of you need the ladder to reach a ledge 20 feet up a vertical wall, how long does the ladder need to be?

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  1. 14 November, 03:35
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    Draw a right triangle with a right angle and a 75 deg angle at the bottom.

    The hypotenuse is the length of the ladder.

    sin A = opp/hyp

    sin 75 = 20/hyp

    hyp = 20/sin 75 = 20.7

    Answer: 20.7 ft
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