GED Mathematical Reasoning TestQuantitative Problem Solving with MeasurementEasy
A worker is painting a rectangular wall that is 15 feet long and 9 feet high. What is the area of the wall that needs to be painted?
- A135 square feet
- B24 square feet
- C48 square feet
- D225 square feet
Show answer & explanationAnswer & explanation
Correct answer: A. 135 square feet
The area of a rectangular wall is found by multiplying its length by its height (Area = length × height). So, 15 feet × 9 feet = 135 square feet.
Why the other options are wrong
- B. This is the sum of length and height, not the area.
- C. This is twice the sum of length and height, like perimeter.
- D. This would be the area if both sides were 15 feet.
Area of a Rectangle
The amount of space a two-dimensional surface covers.
- Calculated by multiplying length by width (or height).
- Formula: A = length × width.
- Units are square units (e.g., square feet, square meters).
Memory trick: Area is how much paint you need to cover a surface.