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25+ Points for BEST TWO answers!

  1. What is the surface area of the right trapezoidal prism?

[SEE ATTACHMENT]

A130 cm²

B114.5 cm²

C48.5 cm²

D98.5 cm²


  1. The four walls of a room are going to be wallpapered. The room is shaped like a rectangular prism, and its length, width, and height are 20 ft, 18 ft, and 9 ft, respectively.

How much wallpaper is needed to complete the job?

[SEE SECOND ATTACHMENT]

A684 ft²

B342 ft²

C1080 ft²

D796 ft²

25+ Points for BEST TWO answers! 1. What is the surface area of the right trapezoidal prism? SEE ATTACHMENT A. 130 cm B. 114.5 cm C. 48.5 cm D. 98.5 cm 2. The f class=
25+ Points for BEST TWO answers! 1. What is the surface area of the right trapezoidal prism? SEE ATTACHMENT A. 130 cm B. 114.5 cm C. 48.5 cm D. 98.5 cm 2. The f class=

Verified Answer :

You are not supposed to be wallpapering the ceiling or the floor. Because of that the formula to answering this question is:  2(hw) + 2(lw) [to account for the 4 walls being wallpapered] 
2(9 x 18) + 2(9 x 20) 
2(162) + 2(180) 
324 + 360 
684 is the answer 

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