Question

The area of the base of a prism is 50 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?

Answer 1

I would help but you don't like me

Answer 2

@Mooshka-Skye
Is this a rectangular prism?
@pink33
If you aren't going to help, there's no point in commenting, correct?

Answer 3

it doesnt say @Aveline

Answer 4

Well, I'm assuming it's going to be a rectangular prism (hopefully it's not triangular, since a slant height was not described)
The surface area of a r.prism=2(w*l+h*l+h*w), where w=width, l=length, and h=height.

We know that the area of the base is 50 mm^2, and the perimeter is 30 mm. Using this information, we can conclude that the sides are the lengths 10mm, 10mm, 5mm, and 5mm.
So:
l = 5mm
w = 10mm
h = 7mm

Can you plug these into the equation shown above to find the surface area?

Answer 5

i think so, does that mean the surface area is 310m2?

Answer 6

Good job, that's right :)

Answer 7

oh thankyou