Final answer:
To find the area of the garage door, multiply the width (6 feet) by the length (10 feet), resulting in 60 square feet. To calculate the perimeter, add the length and width and multiply by 2, giving you a perimeter of 32 feet.
Step-by-step explanation:
The question asks us to calculate the area and perimeter of a rectangular garage door where the length is 4 feet longer than its width, and the width is given as 6 feet. To find the length, we add 4 feet to the width, resulting in a length of 6 feet + 4 feet = 10 feet. Now that we have both dimensions, we can calculate the area by multiplying the width by the length (Area = width × length), which gives us an area of 6 feet × 10 feet = 60 square feet.
Next, to determine the perimeter, we use the formula Perimeter = 2 × (width + length). Substituting the known values, we get Perimeter = 2 × (6 feet + 10 feet) = 2 × 16 feet = 32 feet. Therefore, the perimeter of the garage door is 32 feet.