SOLUTION: A factory is to be built on a lot measuring 150 ft by 200 ft. A local building code specifies that a lawn of uniform width and equal in area to the factory must surround the factor

Question 987814: A factory is to be built on a lot measuring 150 ft by 200 ft. A local building code specifies that a lawn of uniform width and equal in area to the factory must surround the factory.
Answer by josgarithmetic(39617) (Show Source): You can put this solution on YOUR website!
w and L for width and length of the floor of the factory, these KNOWN.
x, unknown uniform width surrounding the factory.

, the factory area.
, the combined border plus factory area.
, also is the combined border plus factory area.

or
The area of this factory must be surrounded by area of uniform width so that this border
area is equal to the factory area:

Solve for x.
Once that is done, evaluate x according to .

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