SOLUTION: A rectangular plot is 15m long and 10m wide. It is surrounded by a concrete walk of uniform width. The area of the walk is equal to the area of the plot. How wide is the walk?

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Question 944749: A rectangular plot is 15m long and 10m wide. It is surrounded by a concrete walk of uniform width. The area of the walk is equal to the area of the plot. How wide is the walk?
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
w, width of plot
L, length of plot
u, UNIFORM width border around plot
;
w=10
L=15

wL, area of the plot.
%28w%2B2u%29%28L%2B2u%29, area of the plot AND the walkway.

The wording of the last part of the description means that the total area is two times the plot area; and the question is, find u.

highlight_green%28%28w%2B2u%29%28L%2B2u%29=2wL%29
Solve for u, and plug in the given values.