Answer:
The length of the second rectangle is 192 cm.
Explanation:
1. Calculate the area of the first rectangle.
The area (A) of a rectangle is given by the formula A = length × width. For the first rectangle: A = 72 cm (length) × 56 cm (width) = 4032 cm² (area).
2. Determine the area of the second rectangle. According to the question, the second rectangle has the same area as the first one. Therefore, the area of the second rectangle also is: A = 4032 cm².
3. Use the area to find the length of the second rectangle. We know the width of the second rectangle is 21 cm, and we want to find its length (let's call it L).
Again, using the area formula: A = length × width, and rearranging for length, we get: length = A / width. For the second rectangle