Question 100220
Good question. Let's work through this step by step.
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We have two pieces of information:

1. The perimeter has to be - 524 yards.

2. The width has to be - 58 yards.
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Now, since it's a rectangle two sides are going to be 58 yards. That accounts for 116 yards (2*58). So, we can subtract and see what has to be accounted for:
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524 - 116 = 408 yards
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We also know that the remaining two sides have to be equal in length. So if one side was 'x' then 2*x would have to be 408 yards. (We have an equation).
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2x = 408 (divide both sides by 2)
x = 204
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Hence, the length is 204 yards.