GED Mathematical Reasoning TestQuantitative Problem Solving with MeasurementEasy
A homeowner is planning to build a rectangular deck with an area of 180 square feet. If the length of the deck is 15 feet, what is its width?
- A10 feet
- B16 feet
- C12 feet
- D14 feet
Show answer & explanationAnswer & explanation
Correct answer: C. 12 feet
The area of a rectangle is calculated by multiplying its length by its width (Area = Length × Width). Given the area and length, the width can be found by dividing the area by the length.
Why the other options are wrong
- A. This would result in an area of 150 square feet (15 × 10).
- B. This would result in an area of 240 square feet (15 × 16).
- D. This would result in an area of 210 square feet (15 × 14).
Area of a Rectangle
The area of a rectangle is the amount of space enclosed within its sides. It is calculated by multiplying its length by its width.
- Formula: Area = Length × Width
- Units are always square units (e.g., ft², m²)
- Used for measuring flat surfaces like floors, walls, or land plots
Memory trick: Length times Width, that's the Area's stride!