GED Mathematical Reasoning TestQuantitative Problem Solving with MeasurementEasy
A rectangular garden measures 12 feet in length and 8 feet in width. If a fence is to be built around the entire perimeter of the garden, what is the total length of fencing needed?
- A24 feet
- B20 feet
- C40 feet
- D96 feet
Show answer & explanationAnswer & explanation
Correct answer: C. 40 feet
To find the total length of fencing needed, calculate the perimeter of the rectangular garden using the formula P = 2(length + width).
Why the other options are wrong
- A. This is twice the length, ignoring the width.
- B. This is the sum of length and width, not the perimeter.
- D. This is the area of the garden, not the perimeter.
Perimeter of a Rectangle
The total distance around the outside of a rectangle.
- Calculated by adding the lengths of all four sides.
- Formula: P = 2(length + width) or P = 2l + 2w.
- Units are linear (e.g., feet, meters).
Memory trick: Perimeter is the path around your property line.