Answer:
Width is 2 feet and the length is 6 feet.
Step-by-step explanation:
The area of a rectangle is A = l*w. Here the length is 4 feet more than the width or 4 + w and the width is w. So the area is A = w(4+w) = 4w + w²
If the dimensions are changed then the expressions will change. The width is increased by 3 feet. This means the width w becomes w + 3. The length is increased by 3 feet. This means the length becomes 4 + w + 3 = 7 + w. So the area of the new triangle is A = (w+3)(7+w) = w² + 10w + 21.
The new area is 33 feet longer. We can add 33 to the original area then set them equal to each other and solve for w.
w² + 10w + 21 = 33+4w + w² Subtract w² from both sides.
10w + 21 = 33+4w Subtract 4w from both sides.
6w + 21 = 33 Subtract 21 from both sides.
6w = 12 Divide by 6.
w = 2 feet
The original width w is 2 feet. This means the original length which was 4 + w = 4 + 2 = 6 feet.
