We have two right triangles and three different rectangles.
The formula of an area of a right triangle:

l₁, l₂ - legs
We have l₁ = 20cm and l₂ = 21cm. Substitute:

The formula of an area of a rectangle:

l - length
w - width
We have:
rectangle #1: l = 22cm, w = 29cm

rectangle #2: l = 22cm, w = 21cm

rectangle #3: l = 22cm, w = 20cm

The total Surface Area of the triangular prism:

Answer:314
Step-by-step explanation: 3.14 x 100 = 314
Move the decimal two times to the right because there is two zeros
The answer is C
2.5 + 3.4 = 5.9
So:
5.9 x 10^4