<h2>
Answer:</h2>
Hence, she need to buy 7/2 meter length of cloth to make 2 square flags.
<h2>
Step-by-step explanation:</h2>
Let the side of the square flag be x meter.
Now the area of one square flag is: x² square meter.
Since he has to make two square flags this means that the area of two square flag is: 2x² square meter.
Also, Area of two square flag = Total area of cloth.
As one side of cloth is 7 meter and the other is x meter.
Hence, the area of cloth so used is: 7x square meter.
Hence, we get:
2x²= 7x
⇒ 2x²-7x=0
⇒ (2x-7)x=0
⇒ either x=0 or 2x-7=0
⇒ x=7/2
Hence, the least amount of fabric she should buy is:
7/2 meter in length
