Question

What is the surface area of a rectangular prism that has a length of 18 inches, a width of 1 foot, and a height of 14 inches?

252 in. 2
3,024 in. 2
1,272 in. 2
568 in. 2

Answer 1

Answer:
The answer is 1,272
Explanation:
to find the surface area of a rectangular prism you need to multiply length by width 18 x 12= 216 then multiply length by height 18 x 14= 202 then multiply width by height 12 x 14= 168 then multiply all of the products by 2. 216 x 2= 432, 202 x 2= 504, 168 x 2= 336. Then add all of the products multiplied by 2. 432+504+336=1,272. So 1,272 is the answer.

LxW
LxH
WxH

Answer 2

C

Explanation:

Givens

L = 18 inches

W = 1 foot = 12 inches

H = 14 inches

Surface Area = 2 * L*w + 2*L * h + 2*w*h

Surface Area = 2 * 18*12 +2*18*14 + 2*12*14 all in linear inches

Surface Area = 432 + 504 + 336 all in square inches

Surface Area = 1272 in^2