Question

The area of the base of a prism is 55 mm2. The perimeter of the base is 30 mm. The height of the prism is 7 mm.

What is the surface area of the prism?

A.
445 mm2

B.
320 mm2

C.
265 mm2

D.
92 mm2

I picked C

Answer 1

Well lets see

\[\large SA = \text{Perimeter of base} \times H + 2(\text{Area of base})\]
\[\large SA = 30 \times 7 + 2(55)\]
\[\large SA = 210 + 110\]
\[\large SA = 320\]