PERT Practice Test 2025 – Comprehensive Study Guide for Postsecondary Education Readiness Success!

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If the perimeter of a rectangular swimming pool is 30 meters and the width is 3 meters less than its length, what is the width of the pool?

4 meters

6 meters

To determine the width of the rectangular swimming pool given the perimeter and the relationship between its length and width, we can use the formula for the perimeter of a rectangle, which is \( P = 2L + 2W \), where \( L \) is the length and \( W \) is the width.

According to the problem, the perimeter is 30 meters, and the width is described as being 3 meters less than the length. This gives us two equations:

1. \( 2L + 2W = 30 \)

2. \( W = L - 3 \)

Substituting the second equation into the first, we can express everything in terms of one variable, the length:

1. Substitute \( W \) in the perimeter equation:

\( 2L + 2(L - 3) = 30 \)

2. This simplifies to:

\( 2L + 2L - 6 = 30 \)

\( 4L - 6 = 30 \)

3. Adding 6 to both sides:

\( 4L = 36 \)

4. Dividing by 4 gives:

\( L = 9 \)

Now that

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9 meters

12 meters

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