Question

The net of a rectangular prism and its dimensions are shown in the diagram.
7.5 in.
7.5 in.
3 in.
3 in.
11.5 in.
11.5 in.
What is the total surface area of the rectangular prism in square inches?
A 143.25 in.2
B 241.5 in.?
C 258.75 in
D 286.5 in.?

Answer 1

Answer:

D.

Step-by-step explanation:

Given: Dimensions of a rectangular prism are $7.5\,\,inches,3\,\,inches\,,\,11.5\,\,inches$

To find: total surface area of the rectangular prism in square inches

Solution:

Length of the rectangular prism (l) = 7.5 inches

Breadth of the rectangular prism (b) = 3 inches

Height of the rectangular prism (h) = 11.5 inches

Total surface area of the rectangular prism = 2(lb+bh+hl)

= $2(7.5\times3+3\times11.5+11.5\times7.5 )$

$2(7.5\times3+3\times11.5+11.5\times7.5 )=2(22.5+34.5+86.25)\\=2(143.25)\\=286.5\,\,square \,\,inches$

So, option D is correct

Answer 2

Answer:

D! I got it correcttt

Step-by-step explanation: