Question

Caroline's bedroom is the shape of a rectangular prism that measures thirteen feet long, ten feet wide, and 9 feet high. What is the surface area of her room?

sixty-four square feet

one hundred thirty-four square feet

six hundred seventy-four square feet

one thousand one hundred seventy square feet

Answer 1

Area of the surface facing us is: 13 x 9 = 117.
And there is one identical on the back. so 2 x 117 = 234.

Do the same for the surface on the left and the surface at the bottom.
Double each of them and add them all up.

Answer 2

So it would be 674 @ranga

Answer 3

Yes!