Can someone answer. there is one problem. there's a picture. you.

You have to find the area of each face and add them all together. You also need to find the unknown side which is indicated in the picture i attached.

Split it into a net shape and find he areas

if you look and reead carefully

equilataral, means all sides are equal, also means that te heights of all side rectangles are the same

so we only need to find the area of the 2 triangles and the 3 rectangles

area of triangle=1/2bh
b=5
h=4.3
since 2 triangles, times 2
1/2*2*5*4.3=21.5

the 3 rectangles
area=legnth times width
legnth=20
width=5
3 of them so times 3
3*20*3=300

find total by adding

21.5+300=321.5
2nd is anser