benlindquist
  • benlindquist
The surface area of a rectangular prism is 108 centimeters squared. The length is 10 centimeters, and the width is 1 foot. What is the height of the prism?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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welshfella
  • welshfella
you have got mixed units there - centimeters and feet are you sure that is correct?
benlindquist
  • benlindquist
Let me check
benlindquist
  • benlindquist
16 centimeters 4.4 centimeters 4 centimeters 5.8 centimeters

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More answers

welshfella
  • welshfella
the width cant be 1 foot because 1 foot = about 30 cms so that would make the area of the base = about 300 cm2 and total surface area = 10 8
welshfella
  • welshfella
i think thw width might be 1 cm
benlindquist
  • benlindquist
any other possible answers?
welshfella
  • welshfella
lets assume width = 1 cm we have the diagram |dw:1449757229343:dw|
benlindquist
  • benlindquist
4.4 is not the right answer btw
welshfella
  • welshfella
the total surface area = 2 * area of the base + 2 * 10*x + 2 * 1* x = 2*10 + 20x + 2x and the question says this equals 108 cm2 so we have the equation 20 + 20x + 2x = 108 22x + 20 = 108 solve this for x
welshfella
  • welshfella
( x is the height of the prism)
welshfella
  • welshfella
do you follow the above reasoning?
benlindquist
  • benlindquist
would you subtract 20 from 20 and 108 - 20 = ? and then divide 22x into what answer you got
welshfella
  • welshfella
subtract 20 from both sides then divide by 22
benlindquist
  • benlindquist
22x = 86
welshfella
  • welshfella
86???
welshfella
  • welshfella
108 - 20 = ?
benlindquist
  • benlindquist
88
welshfella
  • welshfella
right so 22x = 88 all you need to do now is divide 88 by 22
anonymous
  • anonymous
hi hi hi hi hi hi hi hi
benlindquist
  • benlindquist
x = 25
benlindquist
  • benlindquist
the answer was 7??
welshfella
  • welshfella
??? 88 / 22 = 4
welshfella
  • welshfella
sounds like you are doing an online test..
benlindquist
  • benlindquist
oops, divided wrong.
benlindquist
  • benlindquist
its a lesson
welshfella
  • welshfella
if 1 foot is really 1 cm the answer is 4 cm.
benlindquist
  • benlindquist
i divided wrong
welshfella
  • welshfella
gotta go right now
benlindquist
  • benlindquist
ok

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