Answer:
As only the length of the room changed. It means the length of the room is increased by 175%, because of which the area is increased by 175%.
Therefore, the expression become


And the area of Megan's room is increased by 0.75 square meters.
Explanation:
- Let
be the length of the room
- Let
be the width of the room
So the area of the rectangle will be:

As the statement mentions that the new area of the room is
% of the previous area.
So the new area of the room becomes:

As only the length of the room changed. It means the length of the room is increased by 175%, because of which the area is increased by 175%.
Therefore, the expression become


also


so, the area of Megan's room is increased by 0.75 square meters.