The dimensions of Eric’s pool are 9 feet by 7 feet. He wants to build a walkway surrounding the pool so that the square footage of the walkway and pool is 143 square feet. How wide is one side of the walkway?

Question

The dimensions of Eric’s pool are 9 feet by 7 feet.  He wants to build a walkway surrounding the pool so that the square footage of the walkway and pool is 143 square feet. How wide is one side of the walkway?

goformit100 · Answer

Multiply both quantities

anonymous · Answer

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jim_thompson5910 · Answer

If you add x to each side, then you're basically taking the length of 9 and adding 2x to get the new length 9+2x

Similarly, the old width of 7 becomes 7+2x


So the overall dimensions are 9+2x by 7+2x

jim_thompson5910 · Answer

Since the total area is 143 ft, we can say

A = LW

143 = (9+2x)(7+2x)

From here, solve for x