Answer: 15cm squared
Step-by-step explanation:
Find the area of the rectangle:
Formula: length x width
So 6 x 4 which is 24
Then, find the square:
Formula: side x side
So 3 x 3 which is 9
Finally subtract the two areas to find the remaining sheet of paper
24 - 9 = 15
20/22
Divide both numbers by 2.
10/11.
This is the simplest form.