+0  
 
+4
396
4
avatar+410 

 Plz help.

 Mar 20, 2018
edited by Donut  Mar 20, 2018
edited by Donut  Mar 20, 2018
 #1
avatar+644 
+2

How are we supposed to use pi in the problem. And what do we do?

 Mar 20, 2018
 #2
avatar+410 
0

oh whoops. lemmie fix that.

 Mar 20, 2018
 #3
avatar+106532 
+2

Top  13 * 16  =  208

Two triangles at front and back at the top  =  5 * 12   =  60

" Left Side"  at the top  = 5 * 16  =  80

 

Two sides  of 16*7  =  2*16*7  =  224

Front and back at the bottom part  =  2*12*7  = 168

 

Bottom  = 12 * 16  =  192

 

Adding all of these

 

208 + 60 + 80 + 224 + 168 + 192  =

 

932  ft^2

 

 

cool cool cool

 Mar 20, 2018
edited by CPhill  Mar 20, 2018
 #4
avatar+8842 
+1

Here is another way to think about it  smiley

 

If we let the side facing us be the base, then we look at the shape like a prism....

 

surface area  =  (perimeter of base)(height)   +  2(area of base)

 

perimeter of base  =  7 + 12 + 7 + 5 + 13   =   44    ft

 

height  =  16 ft

 

area of base  =  area of triangle + area of rectangle

area of base  =  (1/2)(12)(5) + (12)(7)

area of base  =  30 + 84

area of base  =  114          ft2

 

surface area  =  ( 44 ft )( 16 ft )  +  2( 114 ft2 )

surface area  =  704  ft2  +  228  ft2

surface area  =  932  ft2

 Mar 21, 2018

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