Sunday

January 25, 2015

January 25, 2015

Posted by **mary** on Monday, April 18, 2011 at 9:34am.

so far this is what I have-

(2(8)+2(5))2=72 + 2(8.5)=80

my answer is 152in^2

the books answer is 132in^2

What did I do wrong???? Thanks for the help!

- geometry -
**Jai**, Monday, April 18, 2011 at 9:54amrecall that surface area of rectangular prism is given by

SA = 2*(LW + LH + WH)

where

L = length

W = width

H = height

substituting,

SA = 2*[(8)(5) + (8)(2) + (5)(2)]

SA = 2*(40 + 16 + 10)

SA = 2*(66)

SA = 132 in^2

hope this helps~ :)

- geometry -
**mary**, Monday, April 18, 2011 at 10:05amThank you so much Jai-that really cleared thing up

**Answer this Question**

**Related Questions**

GEOMETRY - NEED HELP - The surface area of a rectangular prism is 190 square ...

geometry - the base of a right triangular prism has a width of 8 inches and a ...

Geomertry - The surface area of a rectangular prism is 190 square inches, the ...

geometry - The surface area of a rectangular prism is 190 square inches, the ...

geometry - The surface area of a rectangular prism is 190 square inches, the ...

Math Measurements - If the length (L) of the prism is 10 inches, and each ...

geometry - The oblique prism has a height of 6 inches, a width of 2 inches and a...

geometry - Find the lateral area of a rectangular prism if the base edges are 10...

geometry - Find the height of a rectangular prism with a surface area of 286 ...

math - What is the total number of vetices in a rectangular prism with a length ...