A rectangle has length that is 4 inches longer than its width. It’s perimeter is 36 inches. Which of the following is it’s area?

A. 54
B. 64
C. 77
D. 81

Respuesta :

Answer:

C. 77

Step-by-step explanation:

Let l be length and w be the width of the rectangle,

Thus, the perimeter of the rectangle = 2 ( length + width )

= 2 ( l + w )

According to the question,

l - w = 4 ⇒ l = 4 + w

Also, 2(l+w)=36

2(4 + w +w)=36

4 + 2 w = 18

2w = 14

w = 7

So, the width of the rectangle is 7 inches.

And, length = 4 + 7 = 11 inches

Thus, the area of the rectangle = length × width

= 11 × 7

= 77 in²

Option 'C' is correct.

The area of the rectangle is 77 square inches if the rectangle has a length that is 4 inches longer than its width. Its perimeter is 36 inches option (C) is correct.

What is the area of the rectangle?

It is defined as the space occupied by the rectangle, which is planner 2-dimensional geometry.

The formula for finding the area of a rectangle is given by:

Area of rectangle = length × width

We have:

Let's suppose the width of the rectangle is W

Length of the rectangle L = 4 + W

Perimeter of the rectangle P = 36 inches

Now, the perimeter of the rectangle = 2(L+W)

36 = 2(l+W)

36 = 2(4 + W+W)      (L = 4 + W)

W = 7 inches

Now, length of the rectangle L = 4 + W ⇒ 4+7 ⇒ 11 inches

Now the area of the rectangle = L×W

= 11×7

= 77 square inches

Thus, the area of the rectangle is 77 square inches if the rectangle has a length that is 4 inches longer than its width. Its perimeter is 36 inches option (C) is correct.

Learn more about the area here:

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