College Math Placement Practice Test 2026 – Comprehensive All-in-One Guide for Exam Success!

To find the length of a rectangle when the area and the width are known, you can use the formula for the area of a rectangle, which is given by:

Area = Length × Width

In this case, the area is 48 square units, and the width is 4 units. We can set up the equation:

48 = Length × 4

To find the length, you can rearrange the equation. Divide both sides by 4:

Length = 48 / 4

Calculating this gives:

Length = 12

Therefore, the length of the rectangle is 12 units. This matches the second option and shows the relationship between area, width, and length clearly. By using the area formula and performing the division, we derive the correct length corresponding to the given area and width.