Answer:
125%
Step-by-step explanation:
In this kind of question, we could choose any arbitrary value for the length of the side of the square.
Let’s say the square is 10m in length, a 50% increase in the length means we add 5 to the original length making the new length to be 15m.
The area of a square is L^2
The former area is 10 * 10 = 100 while the new area is 15 * 15 = 225
The percentage increase is calculated as follows:
We simply subtract the old from the new to yield 225 - 100 = 125
The percentage increase would now be :
125/100 * 100 = 125%
