Question

Angela decided to make a pen for her dog that is 6 feet wide and 9 feet long. However, after looking at the place where she wanted to put the pen, she decided the width should instead measure only 3 feet. If she wants the perimeter of the pen to stay the same, what will be the new length of the pen?
A.
27 feet
B.
24 feet
C.
6 feet
D.
12 feet

Answer 1

The answer would be D. This is because the perimeter of the first one 6+6=12 and 9+9=18 then add those together to get 30. Now we have the first perimeter you take 30 then subtract 3 twice to get 24. Now take 24 and divide it by 2 to get the length which is 12 aka D