Answer:
48 cm
Explanation:
The surface area of an object will be all of it's side area's added up.
Looking at this, we can see that there are 4 sides with side lengths 2 and 5, and 2 with side lengths 2 and 2.
The area of a rectangle is it's length times width.

Since there are 4 of these sides:
.

Since there are two of these sides:
.

Hope this helped!