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

Answer 1

A prism has identical top and bottom surfaces and it has lateral surface (side surface).
Total surface area = 2 * area of base + perimeter * height

Answer 2

265

Answer 3

Bottom area = 55
Top area will be the same as the bottom. Therefore, 55
Lateral or side surface area = perimeter of base * height = 30 * 7 = 210

Total surface area = 210 + 55 + 55

Answer 4

320

Answer 5

320

Answer 6

Eh?