to find the surface area of a rectangular prism, you can use the formula:
surface area = 2lw + 2lh + 2wh
where l is the length. w is the width. and h is the height.
in your case the
l=5 (length)
w=5(width)
h=1(height)
plug these into the formula
surface area = 2(5x5) + 2(5x) + 2(1x5)
now calculate
surface area = 50 + 10 + 10
so the surface area of the rectangular prism with dimensions of 5 by 5 by 2 is 70 square units.