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1 April, 19:00

Lot ABCD between two parallel street lines is 350.00 ft deep and has a 220.00-ft frontage (AB) on one street and a 260.00-ft frontage (CD) on the other. Interior angles at A and B are equal, as are those at C and D. What distances AE and BF should be laid off by a surveyor to divide the lot into two equal areas by means of a line EF parallel to AB?

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  1. 1 April, 20:32
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    240.83 ft

    Explanation:

    The distances AE and BF will be equal = 182.58 ft

    The area of the lot will be the product of the depth and the average of the two frontages

    = (350 * (220 + 260) / 2) = 84000 ft

    Half of the area becomes 42000 ft


    Hence 42000=h/2 * (220 + 220 + 2h*tan3.3)

    Solving, we obtain h = 182.28ft

    EF = 220 + (2*182.28*tan 3.3)

    = 240.83ft
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