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how many square feet of cardboard does jessica have to make a rectangular prism if she has a length of 16 inches a width of 9 inches and a height of 4 inches??

Guest Mar 31, 2017
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 #1
avatar+189 
-1

V=l*w*h

V=16*9*4

V=576

 

A=l*w

A=16*9

A=144

Snappingtunic99  Mar 31, 2017
 #2
avatar+79835 
+1

I assume  you have a prism with a length of 16 inches, a width of 9 inches and a height of 4 inches and you want to know the surface area

 

1st...convert these to feet

 

16 in  =  1 + 1/3 ft  = 4/3 ft

9 in  =    3/4 ft

4 in  = 1/3 ft

 

And the surface area  =

 

2 [ 4/3 * 3/4  + 4/3 * 1/3 +  3/4* 1/3 ] =

 

2 [ 1  + 4/9 + 1/4 ] =

 

2 [ ( 36 + 16 + 9 ) / 36 ] =

 

(1/18) ( 61) =

 

(61 / 18)  sq ft  ≈  3.38 sq ft.

 

 

 

cool cool cool

CPhill  Mar 31, 2017

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