This is from the question i posted before it just didn’t attach

300 square units

Step-by-step explanation:

Notice that the surface area is the addition of all surfaces of the object. So, one needs to add the surface of three rectangles (the lateral sides) plus two right angle triangles (the base and the top which have the exact same shape and therefore area);

These areas are:

Rectangle 5 x 8 = 40

Rectangle 12 x 8 = 96

Rectangle 13 x 8 = 104

2 triangles of base 12 and height 5 = 2 ( 12 x 5 / 2) = 60

Total surface area = 40 + 96 + 104 + 60 = 300

123

step-by-step explanation:

agngel